Access Violation Error

sid

Hi I've been working on Fluent 6.0 to simulate a fuel cell with multi-channels to evaluate its performance by way of current density... i have written udf for calculation of source terms... during compilation of the code... I got this error message several times, it says - Error: Access Violation. I dont know the exact reason for this error, if someone can help shed some light on it, it wud be useful... i think i have found two sources of this error, although i m sure there a re many more... 1. this happens when any of the calculated parameters reaches the value infinity, may be because the denominator is zero. This happens a lot when you are trying to extract parameters on a face, by a udf - macro.. a lot of the times that value is zero and when u divide something by it, it will lead to the above error. 2. this happens when you are trying to calculate some parameter using a wrong type of macro, say, current density by way of a DEFINE_PROFILE or DEIFNE_ADJUST macro... then there is often a mismatch between the return type that is expected and the return type that you are calculating... make sure that u define the correct macros along with correct return types... hope this helps some of u...