Rowlocks and fastlocks are incompatible with transaction processing; you cannot have either ROWLOCKS or FASTLOCKS set on when transaction processing (TRANSACT) is set on. If you set transaction processing on when ROWLOCKS or FASTLOCKS are set on, R:BASE forces the ROWLOCKS and FASTLOCKS settings off. If you try to set ROWLOCKS or FASTLOCKS on when transaction processing is set on, R:BASE displays an error message.

Transaction Processing Topics
Using Transaction Processing  
Locking Table Access and Resource Waiting  
Automatic Table and Database Locks  
Setting Exclusive Table Locks  
Displaying Transaction Processing Locks  
Resource Waiting in Transaction Processing  
Recovering from Transaction Processing Errors  

See also
SET ROWLOCKS Command  
SET TRANSACT Command