Run time error

hi gurus,

i copied the medruck form and did some modifications on the layout. but when i tried to test it using new output types in ME23N, i got runtime error stated " GETWA_NOT_ASSIGNED_RANGE. This error is in program SAPLSTXC. I did not use that program. The standard print program SAPFM06 is used into the new form.

Please advise on how can i correct this error.

thanks in advance.

akira