Dear all, I build an IDL widget interface to control three C programms which evaluate our data. When these programms were developed we spent much time in an accurate error handling because of these programms deal with web access to a database and so on. Now I want to give the user the posibility to control the actions taken by these C programms from my IDL interface which later will plot the data. Therefore I tried to show the output of my C programms (which is send to stderr in the programms) in a text widget. Unfortunately I did not succeed. Do anybody of you have a suggestion how to solve this problem? Thank you very much in advance. With best regards, Oliver