Error updating business component at step '<?>'.(SBL-BPR-00187)

hi guys,

We Have a worflow:

1. Query Service Request BC: Get Row Id

2. Query Service Request BC: Other parameters

3. if a condition in BC field of Service Request is = 'Asset' so.......

4. Query Asset Mgmt - Asset BC: Get Row Id

5. Update BC field (Flag) of Asset Mgmt - Asset

This process is cyclical and ends when the records do not meet the conditions

ends.

this is successful, but not constant, because in any time now in the process cyclical displays the following error in the workflow : Error updating business component at step '<?>'.(SBL-BPR-00187)

I dont have any BS or invoke any Bussines Service in this workflow.