Thanks Ajay for your prompt response.
Actually, this error comes up when using the excel upload functionality (Z Options) which does not allow to post document in SAP due to this error and proceed further.
When tested this error in one of the testing system using test user id copying the user's roles from production, i could find that when this parameter is deleted from user's profile, then the error is resolved and document gets posted in SAP through the Z options which calls RFC
I cannot directly delete the parameter and i need to find out which default option the user has set which might have resulted in that error. Therefore first of all i need to know the t-code where this parameter id FO02 is related to ?
Regards
Divesh