Text file data source directory names and individual text file names must not contain spaces.
Text file data source directory paths are limited in length as follows:
Native mode: 121 bytes
Unicode mode: 1028 bytes
Single quotes (') are not allowed in these data source entities:
Relational data source schema, catalog, table, or column names.
Text file data source directory, file, or column names.
Non-English characters are not supported in data source names (DSNs).
If source data is added, modified, or deleted while the sample data viewing window is open, data does not automatically refresh in the open window. You must close the window and reissue the View Sample Data command to view the changed data.