PDF Split-Merge Unknown Source error

I get an “Unknown Source” error about 75% of the time when I try and use the PDF merge function.  What typically causes this?

Thanks.

I have tried sending the files to you and you don’t have the same problem.  I think it has something to do with my system.  Sony Vaio running Windows 7.
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What version of PDF Split-Merge are you using?

We suggest you may download PDF Split-Merge v3.0 from our website to try again, will PDF Split-Merge v3.0 work fine to you?

https://www.verypdf.com/pdfpg/pdfpg.exe

VeryPDF

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