Error message "Enter the unit of measure" in WebClient ???

Hello Experts,

We are working on CRM 5.0 SP 7, IC WebClient and have implemented the BAdi "CRM_SERVICEPROD_BADI" to assign a service product ''INVESTIGATION' whenever user selects service ticket in WebClient.

However, when confirming a Business Partner and accessing the service ticket, an error is getting displayed stating "Enter the unit of measure".

We have already mentioned the unit of measure in Product but it seems it is not picking from there.

Please help me to remove this error.

Reward points assured for useful answers.

Regards,

Amit