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Old   February 24, 2004, 13:27
Default access violation
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does anyone have any experiece in resolving errors of the following type ?

Error: FLUENT received fatal signal (ACCESS_VIOLATION) 1. Note exact events leading to error. 2. Save case/data under new name. 3. Exit program and restart to continue. 4. Report error to your distributor. Error Object: ()

I DONT UNDERSTAND WHAT IS GOING ON. Any suggestions will help me. What I did in fluent is the following 1. seperated a few cells at the boundary of my 2D model 2. applied heat source (W/m3) in the new zone thus created ..

The same mesh was doing fine earlier .. but now this fatal error ! why would that happen ?
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Old   February 25, 2004, 04:22
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This is a common Fluent error that usually appears with no reason at all...I guess Mr. Gates could tell us more about it)

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Old   February 25, 2004, 09:58
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do you mean this error comes only on windows platform?

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Old   February 25, 2004, 10:59
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Hi! The error is quite common, and It is often difficult to find the reason of it. Anyway, I have the feeling that it is not due to the operating system.

It is true that It usually appear on windows platforms, but I think that on unix platforms it just changes name (SEGMENTATION VIOLATION, which appears sometimes also on windows platforms).

I know that the ACCESS VIOLATION error can occur when you use in your UDF a number of scalars or memories different from that defined in Fluent. I think that the error is connected to the usage of memory, and to the access to memory locations.

I hope this helps.

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Old   November 6, 2010, 21:27
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"UDF a number of scalars or memories different from that defined in Fluent"
Could you explain it? I cant make sence. Please giving a detail example. I cant solve my problem.
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Old   November 7, 2010, 11:48
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Access Violation or Segmentation Violation is actually a memory issue, when a call tries to write to or access a memory that it is not supposed to. It can happen when you split meshes. One important thing here is that data file should be read in along with the case before splitting mesh and then both case and data should be saved together. Try to run it with new condition and it should run.
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