unhandled exception when ComboBox selection change

[TradeForge]

Hi;

I have developed an indicator that displays a combobox on the chart. It works fine BUT I have only one user that get an unhandled exception when he changes it. What I sprety weird because the code should handle and Print the exception instead of showing a message box like the exception is not managed.
Note that this user use the 8.1.3.0 64-bit version.

[NinjaTrader_ChelseaB]

Hello TradeForge,

Is the exception from a null object?
What is the full error message?

Are you checking the sensCbx is not null before attempting to assign an event handler?
You should also be checking the TradingSide is not null before attempting to assign this to the selected value.

[TradeForge]

Hi Chelsea;

It is fixed.
The problem was about the fact that this user use an indicator called "Chart Scroll" which hooks the chart control on mouse click/move.
Mine works prefectly, but the exception comes from this other indicator as it doesn't handle custom chart's controls ....