FIX: CommandLine generates IOError, not OSError

Author: effigies

nipype/interfaces/base.py

@@ -1937,7 +1937,7 @@ def version(klass):
                     clout = CommandLine(command=klass.version_cmd,
                                         resource_monitor=False,
                                         terminal_output='allatonce').run()
-                except OSError:
+                except IOError:
                     return None
 
                 raw_info = clout.runtime.stdout