Thankx for answering
As I wrote it, I am working with the Arduino 1.0.1 IDE on Mac OS 10,6,8.
No special message.
I can access the tlc_config.h if I add tlc_config h to an existing sketch using the "add file" order in the sketch menu.
I can then modify the numbers of TLCS to 2 and save the existing sketch. But I do not understand the AlexLeone instruction to delete the Tlc5940.0 file.
With the new sketch which has now two windows, I fear that the number of Tlcs is not modified since I have not deleted teh Tlc5940.o file that I cannot see anywhere.
Hope to be clear