I am an experienced programmer, but new to the Arduino.
I wrote (actually copied a simple blink internal led) sketch. It compiled and uploaded to the Arduino and runs properly.
But I am getting this error/warning message:
" Invalid library found in C:\Users\Owner\Documents\Arduino\libraries\sketch_apr12a: no headers files (.h) found in C:\Users\Owner\Documents\Arduino\libraries\sketch_apr12a "
I did a global file search of the hard drive and located all files with the file extension .H and found what looks like a couple of hundred Arduino header files but they are not located in the folder/directory shown in the error/warning message.
I would appreciate any help to fix this problem.