HI @dngu 

Can you pull the trace error and see what that is saying?

Hi @Kandy Beatty

I have attached the file ie. “Calculate Replenishment Parameters error” in my original message.  It’s the trace errors on some of the items that I exported from the error message.

Any news on this?
I encountered this for the first time today too.
Here is part of the trace:
 

Hi @krausef77  There is no further update on this topic yet.  We are still searching an answer.  Thanks...

We ran into this today also.  Following this thread now...

We had a client run into an issue where they were unable to process because there was an invalid Date/Time parameter. It seemed to have happened related to an upgrade, but I can’t figure out why that would have mattered. 

Acumatica Support was able to find our specific issue.  For the two items that received this error, the “Periods to Analyze” were set to Zero instead of our standard periods we use.  Worked fine when I corrected the items.

Hi all, to confirm what @jwaldron46 found, in testing I found the same. So against the replenishment class on the item (last column by default) must have non zero value to calculate (makes sense!).

Acumatica also identified that if there is a leap year, the calendar may also break.