I am running a 3D solver with a number of coupled grid interfaces.

I am having trouble with the grid interfaces. My simulation works fine, however once i try to read my case and data at a later point in time I recieve this error:

Error: CDR: invalid argument [1]: wrong type [not a pair] Error Object: #f

I have tried uncoupled interfaces, and even with very simple scenarios I am still recieving the same error. Any help or advice would be greatly appreciated. Thanks

hi, i think your case did not save properly. happed to me eartlier as well.

thanks for your reply, how do you make sure it saves properly??

i am writing the case and data after the simulation is finsihed? is there something else i should do?

thanks

no. what i used to (which created problem)if the case was taking too long to save i would cancel it and save it again and somehow somtimes it did not save properly (happened to me twice) which i did not notice at that time. but when i tried to open it later it gave a simiar message.

dont interrupt the cases and data one it is being saved. And once it says 'done' you are sure it has saved properly.

okay thanks for your help.

To anyone else who is interested in a similar problem with grid interfaces. I think I have found a solution.

The problem was being cuased by my grid interfaces, they were on curved surfaces and had slightly different mesh densities. Once i tried to reload these interfaces after i had written the case - they were not matching up within a specific tolerance (i think) so Fluent was outputting an error and not readding the case properly.

The way I have solved this is by using TGrid - this way i dont even need interfaces in the first place.

I build each fluid zone and save it as a seperate mesh. then import each mesh into TGrid and it appends all the meshses together into one - thus there is no need for interfaces and FLUENT does not require the nodes to meet up. Hope this helps someone else as well!