What means the lowest subroutine level exceeded?

The "lowest subroutine level exceeded" error typically occurs in programming contexts when a recursive function exceeds its allowed depth of recursion. This can happen if there is an infinite loop or if the recursion does not have a proper base case to terminate. As a result, the program can crash or produce a stack overflow error. To resolve this, one should check the logic of the recursive calls and ensure they are correctly designed to reach a termination condition.