x = fullpath('') ? fullpath('','') ? fullpath('','')Note that the first result from fullpath('','') is blank (wrong!), but the second result correctly displays the current directory. All subsequent results are consistently correct, but for some reason, having immediately preceded the first invocation by the initial assignment statement that refers to fullpath('') screws up the immediately following result from fullpath called with 2 arguments. The same problem occurs for any path specified in the second argument.