Essbase ODBC timeout S1T00

Connectivity
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Essbase ODBC timeout S1T00

Hi,
Currently connecting Essbase (on Solaris) to Teradata via ODBC.
Getting an intermittent ODBC timeout error ST100.
Sometimes at the start of the SQL and other times after several minutes.
Most of the time, it's OK.

Would anyone:
a) have any explanations
b) know of the connection timeout parm in the ODBC.ini

Thx in advance