Issue with randomizing met date

[Darby]

Hello, I looked at few topics and I can't understand why it didn't work on my save. I try to randomize the met date of 32 boxes on PkHex and I can't.

I tried many commands on the batch editor like the example in the picture but PkHex still tell me that there are "960 files ignored due to an internal error" and I can't understand why. Can someone help me please ? Thank you !

[Kaphotics]

Use the drop downs, don't copy paste. Those properties were renamed a while ago to not have underscores.