I am using the Shell command to launch an exe. I have discovered however that
the command appears not to run if I have any path specified in the Default
File Location (Tools Options General Tab). The code behaves as expected as
long as there is no path specified here. Setting the path in code to a null
string in the Workbook Open event does not solve the problem.

The only solution I have found is to delete the registry key that Excel gets
this value from.

However this is not an optimal solution and I would prefer avoiding changing
the registry. Why this setting should affect launching an application I am
not sure.

Any help or guidance would be much appreciated.