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In IWS version 1.0.1.399 only, there was a bug associated with Open XPanel. If you clicked on the Open XPanel in the toolbar and then selected any EagleML model (for example, Generic SMF), IWS would close unexpectedly. The code was updated to resolve this issue.
Note: Eagle did not push IWS version 1.0.1.399 into the IWS production site (https://tools.eagleaccess.com/iws45/) this week due to this issue.
This issue was tracked as Item #130654.
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