Help on Tutorial 11: Dynamic Mesh
 

I encounter this when I try to save "write case and data" in Beginner's tutorial 11: Dynamic mesh (pdf page 27 out of 30)

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Writing "C:\dynamic_mesh1\valve.dat"... Writing UDF data to data file...

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: ()

Error: Error writing "C:\dynamic_mesh1\valve.dat". Error Object: #f

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Thank you in advance