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i made a panel using free design(files are attached). i couldn't reduce the height. then i tried to close it and then boom! it happens to me time to times but i can't reproduce the same error.
Created attachment 28355 [details] java,form and message.log
*** Issue 71085 has been marked as a duplicate of this issue. ***
As for changing the height - all the components are attached to the bottom edge of the form, so form editor tries to preserve the distance. So rightclick the subpanel and choose Anchor | Top. The exception is the same as in issue 71137. We would appreciate any detail about the situation when it happened. E.g. did you added some new component since you opened the form, or did just modifications to the existing components? *** This issue has been marked as a duplicate of 71137 ***