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Error Code M19

M[UMPS] by Example

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M19, Cannot copy a tree or subtree into itself

Introduced in the 1995 ANSI M[UMPS] language standard.

When a MERGE command is executed, and there is an overlap between the source and the destination of the information to be copied, this error will occur.

Merge ^ABC(1,2,3)=^ABC(1,2,3,4,5,6)
Merge ^ABC(1,2,3,4,5)=^ABC(1,2,3,4)
Merge ^ABC(1,2,3)=^ABC(1,2,3)
Merge ^|HERE|ABC(1,2,3)=^|THERE|ABC(1,2,3)

(in the last example, the error will occur if the value of HERE happens to be equal to the value of THERE).

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Copyright © Standard Documents; 1977-2017 MUMPS Development Committee;
Copyright © Examples: 1995-2017 Ed de Moel;
Copyright © Annotations: 2003-2017 Jacquard Systems Research.

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 29-Nov-2011, 21:30:57 .

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