Occasionally, no error message will appear, but when you go to browse the records in the Source Data Browser, there will be field headings, but no data, not even an empty grid. This means no records were found to match any of the patterns in the CXL script. Either the input data file did not contain the expected text or there is a logic error in the script that prevented a critical action from executing. Subtler logic errors may cause missing or incorrect values to occur in the output.

Logic errors can be caused by anything from a misspelled variable name to a basic misunderstanding of how CXL works. Logic errors can be very difficult and time-consuming to locate. Sometimes, entire sections of a script may need to be re-written using a different approach if the specific problem cannot be found with reasonable effort.