New error: java.lang.NullPointerException: Cannot read the array length because "a" is null

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Sarah Weeks

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Oct 24, 2025, 5:41:34 PMOct 24
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Hello all, 

Has anyone else dealt with this error? 

          java.lang.NullPointerException: Cannot read the array length because "a" is null

I have been happily working with ePADD (yay!) and haven't changed anything on my computer - but this is new today. 

I am running the standalone.jar file via the command line on a PC. This occurs when I go to import more folders into my instance of ePADD. It freezes when I’m about to choose the location from which to import.

I attached the error log to this message, if more info is needed. 


Thanks,

Sarah Weeks
Washington University in St. Louis


epadd_errorlog_sweeks_20251025.rtf

Sarah Weeks

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Oct 27, 2025, 10:57:31 AMOct 27
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all - I figured this out. I was trying to import MBOX files. The field Folder or File Location was already pre-populated with text designating the path from my previous import - which I had since moved off my hard drive, hence the error "null" meaning ePADD couldn't find it. I deleted the text, hit Browse, and was able to import normally. Just thought I'd share in case this helps anyone. 

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