Can you please explain what you mean by 'had no problems'? Did you call and ask in advance? Did you show it to them at the door? Did you have it in your pocket and bring it out while in your little cubicle?

How does one go about getting it approved without raising the issue in advance? Who wants to go in and be surprised at the door either by being told no - when you are counting on it and think it quite impossible to memorize the charts and formulas without? Or, you bring it out and start using it in your little cubby and you are disqualified?

If you call in advance and they check with DSST - they are told only 4 function. That seems to mean no. So, now what?