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If you set the name for file "*" or "?", the java.io.IOExceptio is thrown. This happens for txt,xml wizard ... This is a platform specific bug. See also the issue 48851.
Created attachment 17755 [details] Exception
Shouldn't the summary rather say Creating instead of Opening.
*** Issue 49285 has been marked as a duplicate of this issue. ***
Unfortunately I can't do much about that. There is no method for testing correctness of given filename for given filesystem. The only thing I can do is to catch the exception and show an nicer dialog. If you wnt to fix it for your file type, write your own wizard (E.g. Java has easier job as it can ask the isJavaItdentifier method)
*** This issue has been marked as a duplicate of 44536 ***
closed