The F&M system prevents a cursor function from being executed if there are no displayed graphical views which support cursor functions, and raises the usual 'quit' error (61, 528): 'User exit from submode' so that Appware can handle the effective 'quit', and then raises error (61, 115): 'Invalid command when GRAPHICS OFF or no suitable view available', which will alert you unless trapped by the Appware. However, only the Appware knows exactly which graphical views can handle the specific cursor command, so the OKCurfnView methods have been provided to allow Appware to use this knowledge intelligently.