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-4381 The input file filename has an invalid extension. The file

name must have .4gl as the extension.

You do not need to enter the file extension or suffix of .4gl when you type the name of a program source file. However, if you do type a file suffix it must be .4gl; no other is allowed. If you type the suffix incorrectly, enter the command again omitting the suffix. If the file really has a different suffix, you will have to change it.