Mfg Lead Time Calculation process error

Wonder if anyone has heard/seen errors when running “Mfg Lead Time Calculation” in E10?

I can get it to complete for individual parts.

But when I try to run it for a Prod Code, or “wide open”
I’m seeing this error:
Program Ice.Services.Lib.RunTask raised an unexpected exception with the following message: RunTask: Nullable object must have a value.

And the log start outs listing parts but then just stops.