Error=Too many open files
From Array Suite Wiki
In ArrayStudio/ArrayServer/Oshell, file handlers are not released if the project is still open. User can use CloseProject proc to close the project and release the file handler.
Similar as Thread creation failed Error which is caused by limit on the #process, too many open files error is caused by the limit on the number of open files.
Please change the default ulimit following the Thread creation failed Error page.