I am facing the problem that I have two subsystems (brown and blue in fig.) with common inputs. When I run, I see the error "Index expression out of bounds. Attempted to access element 2. The valid range is 1-1. More information". However, if I just delete either of these subsystems, the other works perfect. But they dont work simultaneously :(.
The error encountered implies that you are trying to access an index greater than one for a variable of size 1*1 that is its having just one element not a vector or matrix. Possibly the subsystem you have deleted has this invalid access to index