You might have a problem with the code pages used
if You are out of luck using a C like character set with [ and ] then use the corresponding trigraph representation
as suggested by the message
SOME SYMBOLS THAT MIGHT BE LEGAL ARE: Ý ??(
where the ??( is the trigraph corresponding to a [
speak to Your support on how to configure Your 3270 session code page
here are the commonly used trigraphs
Code: Select all
| trigraph | replacement
------------------------
| ??- | ˜
| ??! | |
| ??’ | ˆ
| ??( | [
| ??) | ]
| ??/ | \
| ??< | {
| ??= | #
| ??> | }