Informatica: wrong odbc.ini file referred by Workflow mappings
We need to set two odbc related parameters in unix/linux users bash profile.
INFA_HOME=/opt/infa
ODBCINI= $INFA_HOME/ODBC7.1/odbc.ini
ODBCINST=$INFA_HOME/ODBC7.1/odbcinst.ini
Now, i feel like, your unix/linux user is not able to reach this location or they arent getting exported properly.
Login using the unix/linux user thats running informatica.
Then use more $ODBCINI to see if it has read permission.
Do same for ODBCINST.
Use ssgodbc tool to check connectivity to your mssql server DB.