We have a number of libraries experiencing the following error: Date::Calc::Add_Delta_YM(): not a valid date at /home/koha/kohaclone/C4/Serials.pm line 2626, <DATA> line 522. When we investigate it appears that there is no serial.planneddate value. It is either NULL or there is no entry in the serial table for the subscriptionid. It appears that Koha is not handling 'bad data' well in the serials module in this case.
Hi Joy, I haven't seen this happening and haven't managed to create a serial issue without planned date - do you have some more information on it? On which page does it happen? Is it migrated data or date added to Koha manually?
Katrin- I have seen this in a lot of migrated data. Which is an issue only because previously that date wasn't required for serial functionality. And now the system is throwing errors and is unusable for them. However, I have had newer sites complain of this which makes me think they have someone created a serial without that information. I'll see if I can replicate this. joy (In reply to Katrin Fischer from comment #1) > Hi Joy, > > I haven't seen this happening and haven't managed to create a serial issue > without planned date - do you have some more information on it? On which > page does it happen? Is it migrated data or date added to Koha manually?
Joy, are you able to give more info to reproduce this issue?
I'm going to assume this is no longer an issue since no follow-up information has been provided.