Tag must be a legal variable name for GUIDE to append a callback function prototype to the application code file. The {0} for the {1} with Tag: ''{2}'' can not be appended until a legal tag is chosen. In file {0}, there are multiple copies of system character vector: \n\n {1}\n\nYour program may not run properly. Please remove extra copies. Cannot find function {0} in GUI code file:\n{1}\n\nTo correct this problem and make the {2} work, please make sure the function name {3} is correctly specified and the function exists in the GUI code file. You may also ask GUIDE to auto-generate a callback for you.