Create Activity Dependency

POST /ws/rest/service/v2/activity/sheet/dependencies

Purpose

Creates updates, and deletes activity dependencies for an activity in a specified activity sheet of a specified shell.

Note: In the System Activity Sheet, the Dependency tab although visible, will be view-only.

Prerequisites

Ensure the following:

Request Format

Send an API request as a JSON Map with the following structure:

{

"options":{"project_number": "<value>"},

"data":[]

}

Request Parameters - Options Map

Specify the following parameters:

Request Parameter

Required?

Data Type

Description

project_number

Yes

String

A valid 'Active' shell number.

source

Yes

String

The source application or data from which dependency data is retrieved. Valid values include: "Primavera Cloud", "P6", and "Others".

activitySheetType

Yes

String

The type of activity sheet. Valid values include: "system" and "manual".

For Primavera Cloud and P6 integrations, specify "system", as the data should be inserted in the system activity sheet.

projectType

No

String

The type of project for which dependencies have to be created. Valid values include: "Current" (default), and "Baseline".

For Manual activity sheets, the value is ignored.
For System activity sheets, defaults to "Current".

sourceProjectId

No

String

The project code in the source application. For example, Project code in Primavera Cloud.

For System activity sheets, it is the current project ID by default. For Manual activity sheet, it is the project number.

This field is mandatory if the source is P6 or Primavera Cloud, or the "activitySheetType" is "manual".

activitySheetName

No

String

The name of the activity sheet.

If "activitySheetType" is specified as "system", the value entered in this field is ignored.

If "activitySheetType" is specified as "manual", then this field is mandatory. If a manual activity sheet with same name already exists, a dependency will be added/updated or removed for the activities in that activity sheet.

removeUnreferencedData

No

Boolean

Indicate whether to remove unreferenced data. Valid values include:

  • "true": Creates and updates dependencies specified in the request for the respective activities, and removes dependencies not existing in the current request data for the respective activities from the existing activity sheet.
  • "false" (default): Dependencies are not removed for an activity from the existing activity sheet. The REST service creates dependencies from the request data if they do not exist, and updates any existing dependencies.

By default, any dependency data for an activity not existing in the current request data will not be removed.

Request Parameters - Data [] List

Specify the following parameters in the data [] of the request:

Request Parameter

Required?

Data Type

Description

succ_activityid

Yes

String

The unique activity ID or activity code of the successive activity in the activity sheet.

pred_activityid

Yes

String

The unique activity ID or activity code of the preceding activity in the activity sheet.

relation

No

String

The type of dependency between the tasks. Valid values include:

  • Finish-to-Start (default)
  • Finish-to-Finish
  • Start-to-Finish
  • Start-to-Start

lead/lag

No

Integer

For manual Activity sheet, the max lag value is calculated as:

max_lag_day = Math.floor(20000 / Number(hours_per_day)) - 1;

For system activity sheet, no limit validation is needed.

Default to 0 (zero).

 

 

Response Format

A JSON object is returned in the following format.

{

"data": [],

"message": [<list of messages>],

"status": <REST status code value>,

"rest_audit_id": <id from the audit table>

}

A successful response displays a status code 200.

A failed response displays a message with a status code.

Sample Success Request

To create an activity dependendy, send a request in the following format:

{

"options": {

"project_number": "P-0040",

"source" : "Primavera Cloud",

"sourceProjectId" : "OPCProject",

"activitySheetType" : "system",

"activitySheetName" : "ActSheet1" ,

"projectType" : "Current",

"removeUnreferencedData" : false

},

"data": [

{

"succ_activityid": "A1010",

"pred_activityid": "A1020",

"relation":"Finish-to-Start",

"lag": 10

},

{

"succ_activityid": "A1030",

"pred_activityid": "A1040",

"relation":"Finish-to-Start",

"lag": 10

}

]

}

Sample Success Response

A successful response with status code 200 displays in the following format:

{

"data": [],

"message": [

{

"activitySheetName": "ManualSheet01",

"message" : "Job for dependencies data created successfully.",

"jobId" : 1688113665288

}

],

"status": 202,

"rest_audit_id": 28703

}

Sample Failed Request in Options Data

A failed response to create an activity dependency displays the corresponding status code in the following format:

{

"options": {

"project_number": "P-0040",

"source" : "ABC",

"sourceProjectId" : "OPCProject",

"activitySheetType" : "system",

"actSheetName" : "ActSheet1" ,

"projectType" : "Current",

"removeUnreferencedData" : false

},

"data": [

{

"succ_activityid": "A1010",

"pred_activityid": "A1020",

"relation":"Finish-to-Start",

"lag": 10

}

]

}

Sample Failed Response in Options Data

A failed response to create an activity dependency due to an error in the Options map displays the corresponding status code in the following format:

{

"data": [],

"message": [

"Invalid value was found in a field: [source]. Allowed values: [Primavera Cloud,P6, Others]"

],

"rest_audit_id": 2379,

"status": 12756

}

Sample Data Failure Request

A failed response to create an activity dependency displays the corresponding status code in the following format:

{

"options": {

"project_number": "P-0040",

"source" : "Primavera Cloud",

"sourceProjectId" : "OPCProject",

"activitySheetType" : "system",

"actSheetName" : "ActSheet1" ,

"projectType" : "Current",

"removeUnreferencedData" : false

},

"data": [

{

"succ_activityid": "A1010",

"pred_activityid": "A1020",

"relation":"ABC",

"lag": 10

},

{

"succ_activityid": "A1030",

"pred_activityid": "A1040",

"relation":"Finish-to-Start",

"lag": 10

}

]

}

Sample Failed Response in Data []

A failed response to create an activity dependency due to an error in the Data [] displays the corresponding status code in the following format:

{

"data": [],

"message": [

{

"activitySheetName": "ManualSheet01",

"message" : "Job for dependencies data created successfully.",

"jobId" : 1688113665288

}

],

"status": 202,

"rest_audit_id": 28703

}

Sample Failed Response

A failed response to create an activity dependency due to an invalid value displays the corresponding status code in the following format:

{

"data": [],

"message": [

{

"succ_activityid": "A1010",

"pred_activityid": "A1020",

"message": "Invalid value was found in a field: [relation]. Allowed only [Finish-to-Start, Finish-to-Finish, Start-to-Finish, Start-to-Start].",

"status": 12750

}

],

"status": 3000,

"rest_audit_id": 14302

}

Supported Validation Messages and Status Codes

The following validation messages and status codes display in the response when incorrect values are provided in the request.

Field Name

Use-case Scenario

Status Code

Error Message

project_number

project_number is not specified.

12018

The API request is missing the required information: [project_number].

project_number

project_number is invalid.

602

Project/Shell Number is not correct.

project_number

project_number is inactive.

12020

The API request contains an invalid value: [project_number]. Please check the status of this project_number in Unifier.

project_number

project_number is blank or empty

12128

The API request contains empty value for: [project_number].

source

source is not specified in the request.

12007

The API request is missing the required information: [source]

source

Wrong source value or value type for source i.e., boolean or numbers are specified.

12008

Invalid value was found in a field: [source]. Allowed values: [Primavera Cloud,P6, Others]

source

source value is blank or empty.

12035

The API request contains empty value for: [source]. Allowed values: [Primavera Cloud, P6 Others]

activitySheetType

activitySheetType value is missing.

12010

The API request is missing the required information: [activitySheetType]

activitySheetType

activitySheetType value is invalid.

12011

Invalid value was found in a field: [activitySheetType]. Allowed values: [manual, system]

activitySheetType

activitySheetType is "manual" when source is "Primavera Cloud" or "P6" in the request.

12671

Invalid value was found in a field: [activitySheetType]. If source=Primavera Cloud or P6, allowed values: [system]

activitySheetType

activitySheetType is "system" when source is "Others" in the request.

12671

Invalid value was found in a field: [activitySheetType]. If source=Others, allowed values: [manual]

projectType

projectType is missing in the request.

12143

The API request is missing the required information: [projectType].

projectType

projectType is blank or empty.

12144

The API request contains empty value for: [projectType].

projectType

projectType is the wrong data type(integer/boolean).

12142

Invalid value was found in a field: [projectType]. Allowed only alphanumeric value.

projectType

Some invalid value except "Current"/"Baseline" passed in projectType.

12145

Invalid value was found in a field: [projectType]. Allowed values: [Current, Baseline]

sourceProjectId

sourceProjectId is not configured in the source Unifier shell.

12021

The API request contains an invalid value: [sourceProjectId]. Please check if this sourceProjectId has been configured in Unifier.

sourceProjectId

sourceProjectId has invalid special characters.

12022

The API request contains invalid characters in: [sourceProjectId]. The following characters are not allowed : / \\ : * ? \" < > | ' =

sourceProjectId

sourceProjectId is missing.

12005

The API request is missing the required information: [sourceProjectId]

sourceProjectId

sourceProjectId is blank.

12032

The API request contains empty value for: [sourceProjectId]

sourceProjectId

sourceProjectId length is invalid.

12014

Invalid value was found in a field: 'sourceProjectId'. Allowed length: [250]

activitySheetName

Activity sheet name is blank for an activity sheet type "manual".

12012

The API request is missing the required information: [activitySheetName].

activitySheetName

ActivitySheetName does not exist.

12013

The API request contains an invalid value: [activitySheetName]. Please check if this activitySheetName with type=manual has been configured in Unifier.

removeUnreferencedData

removeUnreferencedData is a non-boolean value.

12016

Invalid value was found in a field: [removeUnreferencedData]. Allowed values: [true, false]

succ_activityid

succ_activityid is missing in the request.

12740

The API request is missing the required information: [succ_activityid]

succ_activityid

succ_activityid is a non-string value.

12741

Invalid value was found in a field: [succ_activityid]. Allowed only string value or use quotations. Activity ID: <succ_activityid>

succ_activityid

succ_activityid does not exist in the Activity Sheet.

12742

Invalid value was found in a field [succ_activityid]. Allowed Activity ID that already exists in Activity Sheet. Activity ID: <succ_activityid>

succ_activityid

succ_activityid is blank.

12743

The API request contains an empty value for:[succ_activityid].

pred_activityid

pred_activityid is missing in the request.

12744

The API request is missing the required information: [pred_activityid]

pred_activityid

pred_activityid is a non-string value.

12745

Invalid value was found in a field: [pred_activityid]. Allowed only string value or use quotations. Activity ID: <pred_activityid>

pred_activityid

pred_activityid does not exist in the Activity Sheet.

12746

Invalid value was found in a field [pred_activityid]. Allowed Activity ID that already exists in Activity Sheet. Activity ID: <pred_activityid>

pred_activityid

pred_activityid is blank.

12747

The API request contains an empty value for:[pred_activityId].

relation

Invalid dependency relation value has been specified in the request.

12748

Invalid value was found in a field: [relation]. Allowed only [Finish-to-Start, Finish-to-Finish, Start-to-Finish, Start-to-Start]

lead/lag

A non-integer value is provided.

12749

Invalid value was found in a field: [lead]. Allowed only integer value

lead/lag

Value exceeds the max_lag_day.

12750

Value entered exceeds maximum allowed lag of <max_lag_day>. Please check and try again

Related Topics

Activities and Assignments

Create, Update, and Remove Assignments

Get Assignments

Create or Update Assignment Spreads

Get Assignment Spread

Get Activity Spread

Get Spread File

Get Spread Job Status

Create or Update Activity Spreads

Create, Update, and Remove Activities from the System Activity Sheet of a Specific Shell

Get Activities from the System Activity Sheet of a Specific Shell

Create, Update, and Delete Activities in the Manual Activity Sheet of a Specific Shell

Create Manual Activity Sheet

Create or Update Baseline Schedule for Manual Activity Sheet

Get Activities in the Manual Activity Sheet of a Specific Shell

Schedule Creation of Manual Activity Sheet

Recost Project for Manual Activity Sheet


Last Published Tuesday, July 1, 2025