Problems mousing over variable names in iPhone debugger

I'm attempting to do some debugging in GDB for an iPhone app issue. When I mouse over a string variable to see the contents the console goes into an infinite scroll with the text "Unable to access variable ".

Any ideas on wh开发者_Python百科y this might be happening?

For future reference, there are several major causes:

• Target-level optimization settings: there should be no optimization
• Target-level strip symbols: symbols should not be stripped
• Target-level level of debugging symbols: default or all symbols should be used
• Per-file compiler flags (get-info on file, choose Debug tab): Make sure there are no optimization per-file settings as there is no way to specify in what configuration (debug or release) they should be used, so they're always used.

I go into more detail here.

I had the same problem and setting configuration to Debug fixed it... quite reasonable :P

Credits to @AranMulholland comment!