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Tracking random license evaluation problem - flip eval flop normal flip

I have a totally weird situation - I randomly get “Evaluation” mark on document previews.

The code has been deployed last Friday and has not been changed since.
On Monday however:
1. Morning presentation: all previews are clean everything works OK
2. Afternoon presentation: all previews have “evaluation” mark on them (tested on ppt, xls, docx, pdf, one, jpg, eml, tif)
3. Evening panic: all previews are clean and everything works OK.

Does anybody have an idea how to track what is causing those problems?
And how to track something like this.


Hi Kris,

Thank you for contacting support. It appears as the Aspose license is not being applied at some stage during the execution of the application. Please make sure to set the license once per application or process for each Aspose library. Aspose License should be applied in some common area of the application. Please also note that the Aspose license should be applied before calling any Aspose library feature.