I run Power System Optimizer (PSO) developed on AIMMS. The current version of AIMMS we have is 220.127.116.114 on the windows server. The software ran with no issues till last week. However, after probably the server update, AIMMS crashes each time I read input files and throws the following error: the thread tried to read from the virtual address for which it does not have the appropriate access. I am not sure what the issue is as the input folder has complete privileges for read/write.