@AmethystPendant : Your information regarding the correct operation of the program by VWD in the "C:VWD" directory is very important. I will ask all the people who work with Windows 10 and who have this error I / O 32 to test using this new directory. This is not an acceptable final solution, but it allows to continue to perform simulations. I got a Windows 10 today and I'll start doing tests with this system tomorrow. I hope this problem will be resolved quickly. As for integration into other software, you are right, the method of creating a DLL is a good method. However, the program can only function by using all the vertices selection functions and all springs generation methods. These functions could be called from the DLL, but in the host software, it would be necessary to create an interface that would resemble so much as the existing one. It is for this reason that I decided to create my interface fully with all its possibilities, even if it could be designed differently. The actual method allows to easily interface VWD with another software by using only few script functions. In all the cases, nothing is always fixed and the possibility you mention is very interessant.

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