Upgrading 3.7 SP2 to SP4 to 5, "Data is Null" error
I am trying to upgrade a Sitefinity 3.7 SP2 site to SP4 using the 'patch' zip file so that I can migrate to Sitefinity 5. There was a problem with the upgrade: after moving the patch files into the project, during build, another project overwrote the SP4 versions of several dlls with SP2 versions, and the web app ran. It failed with the "Data is Null" error. The old versions of the dlls were identified and updated, but now running the project with all SP4 dlls still generates the "Data is Null" error.
It appears that the half SP2, half SP4 dlls may have left the DB in a mixed state. Is there a way to get it updated to the SP4 format?
Devin,
Seeing no other option, I restored DB and SP2 site from backups and reapplied the SP4 patch. Same Data is Null error. sitefinity.log is empty.
I then restored the SP2 backups and tried SF5 migration by installing SF5, and manually configuring the SP2 site for migration by copying MigrationService.svc into the SP2 site. Got assembly errors viewing MigrationService.svc, so I applied SP4 patch to the site and now MigrationService.svc shows Data is Null error. Still no sitefinity.log entries.