Hi - I've used the following formula to calculate the processing time in days:
DateTimeDiff([Requisition Approved Date],[Requisition Creation Date],"days")
Before this, I've use the date parse function to get the dates in a clean & consistent format... so they are all in format YYYY-MM-DD.
The date time diff calculation seems to be working correctly for some instances but not for others. In some cases the real date time difference is for example 2 days, and it's giving me 444 days (very large numbers!). I can't figure out what's going on as the dates are all in a consistent format.
Please help! Screenshot with example attached. (you can see some calcs are working properly & some are not).