☜	Error Code M52 M[UMPS] by Example					☞

M52, Required attribute missing

Introduced in the 1995 ANSI M[UMPS] Windowing Application Programmers’ Interface.

If an application attempts to assign a value to an attribute while not all criteria to be allowed to do so are met, this error will occur. After this, special variable $ERef will contain a value that indicates the reference to the structured system variable for which the error occurred.

For a DEFBUTTON attribute the criteria that need to be met are:

• the gadget must be a ‘child’ of the window;
• the TYPE attribute of the gadget must be "BUTTON".

For gadgets and for menus not displayed as menu bars or as submenus the criteria that need to be met are:

• a value must be assigned to the POS attribute when the gadget is created,
• both a horizontal and a vertical position must be defined.

For a symbol gadget the criterion that needs to be met is:

• the RESOURCE attribute must have a value.

For a generic box or a group frame gadget the criterion that needs to be met is:

• a value must be assigned to the SIZE element attribute when the gadget is created.

For all gadgets a criterion that needs to be met is:

• a value must be assigned to the TYPE element attribute when the gadget is created.

In earlier printed versions of the 1995 ANSI M[UMPS] Windowing Application Programmers’ Interface, this error was identified as M?7.

Copyright © Standard Documents; 1977-2024 MUMPS Development Committee;
Copyright © Examples: 1995-2024 Ed de Moel;
Copyright © Annotations: 2003-2008 Jacquard Systems Research
Copyright © Annotations: 2008-2024 Ed de Moel.

The information in this page is NOT authoritative and subject to be modified at any moment.
Please consult the appropriate (draft) language standard for an authoritative definition.

Some specifications are "approved for inclusion in a future standard". Note that the MUMPS Development Committee cannot guarantee that such future standards will indeed be published.

This page most recently updated on 16-Nov-2023, 14:50:14.

For comments, contact Ed de Moel (demoel@jacquardsystems.com)