how to identify lock?

hello all

in a proccess chain there is a DTP load that fails with message:

"Object requested is currently locked by user XXXX "

Message text Lock NOT set for: Extraction from InfoProvider

Message text Object is locked by user

Exception CX_RS_FOREIGN_LOCK logged

i understand this is caused by another proccess chain that is running at the same time but how can i identify it?

thanks