1. This function is similar to getparam except that the control parameter name is searched at runtime. As a consequence this identifier does not need to be a constant string but the execution is significantly slower than getparam and it cannot be applied to package parameters.

2. The provided parameter name must include the module name ( e.g. "mmsystem.datefmt") otherwise the identifier is searched only in the list of Mosel parameters.

3. As opposed to getparam this procedure does not raise an error in case of failure (like parameter not found): use getsysstat to detect error conditions.