An error is reported when the button time is used in ALV

Time：2022-5-10

1. When you click a button in ALV, the following error is reported

Call (PERFORM) to a non-existent external routine.

 

 

 

It is also possible that some fields do not correspond well due to copying other programs. Check the ALV structure carefully. Because the structure does not contain the change field box_ For the column assigned by fieldname, just add a new structure.

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