When a user tries to write to a locked file, the Btrieve interface performs a 15-second wait and retry operation before it reports an error condition (99) to the runtime. Setting the BTRV_NOWRITE_WAIT configuration variable to TRUE (the default) prevents this operation from occurring, and the error condition is reported immediately. Setting BTRV_NOWRITE_WAIT to FALSE causes the interface to perform the wait and retry operation.