FAQ 483: Calculations--Valuation calculations freezing or locking up

Problem: This case freezes in ASCWIN when trying to run Calculations - Valuation. Will you take a look at it?

Solution: If the system locks up immediately when beginning a calculation, check the dates coded in the "Plan Year Begin" and "Valuation Date" fields in the plan specs. If these are incorrect, generating plan years that are longer than one year (for example, 1/1/1981 to 12/31/2005, as in your case), you can see behavior like you are seeing. You can also run the Data Checks for Plan Specs under Utilities, which would have found this as well.