Errors after upgrade from 6.3 to 7.5

[gonzalo....@gmail.com]

Hello.

I tell you about a couple of errors that I have after migrating from 6.3 to 7.5.

1) I didn't see any error in the database import process, but when browsing the dspace 7.5 installation, the structure is the same as in 6.3, but some collections are totally empty.

2) in the records that were imported fine, with their attached files, when I want to download that file, I get this error:

Whitelabel Error Page
This application has no explicit mapping for /error, so you are seeing this as a fallback.
Mon Mar 27 13:12:52 UTC 2023
There was an unexpected error (type=Internal Server Error, status=500).
An internal read or write operation failed

Thank you in advance!

[Tim Donohue]

Hi,

There's no enough information in this message for someone to help you out.  I'd recommend using our Troubleshooting Guide to locate the error message behind that 500 error, as it may provide more information about what is going on in your installation: https://wiki.lyrasis.org/display/DSPACE/Troubleshoot+an+error#Troubleshootanerror-DSpace7.x(orabove)

It's important to locate the detailed error message (including a stacktrace) if possible, as that'll provide others with clues about what the cause of the error may be.  Once located you can send it to this list if you need more help.  Some common installation errors (with solutions) are also listed at https://wiki.lyrasis.org/display/DSDOC7x/Installing+DSpace#InstallingDSpace-CommonInstallationIssues

Tim