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About building parametric objects with GDL.
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Questioning about Backward Migration Script !!!

Nader Belal
Mentor
Hi there,

I was reading ArchiCAD GDL Reference Guide about Backward Migration, and I have found the following in the guide,
Backward migration only works for one version back, so the targetGUID only needs to be set once (except when you make a fork in the migration to separate previous-version objects).

What is the guide trying to point out with "except when you make a fork in the migration to separate previous-version objects" ?
A good friend of mine have once told me that I´m so brute that I´m capable of creating a GDL script capable of creating GDLs.
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Solution
Barry Kelly
Moderator
I assume it is the opposite of merging two objects in forward migration.
i.e. 'Tree 01 23' and 'Tree 02 23' become 'Tree 24'.

So you will need 2 target IDs if you want to split them when migrating backwards.


Barry.
One of the forum moderators.
Versions 6.5 to 27
i7-10700 @ 2.9Ghz, 32GB ram, GeForce RTX 2060 (6GB), Windows 10
Lenovo Thinkpad - i7-1270P 2.20 GHz, 32GB RAM, Nvidia T550, Windows 11

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Solution
Barry Kelly
Moderator
I assume it is the opposite of merging two objects in forward migration.
i.e. 'Tree 01 23' and 'Tree 02 23' become 'Tree 24'.

So you will need 2 target IDs if you want to split them when migrating backwards.


Barry.
One of the forum moderators.
Versions 6.5 to 27
i7-10700 @ 2.9Ghz, 32GB ram, GeForce RTX 2060 (6GB), Windows 10
Lenovo Thinkpad - i7-1270P 2.20 GHz, 32GB RAM, Nvidia T550, Windows 11
Nader Belal
Mentor
Thank you Barrey
A good friend of mine have once told me that I´m so brute that I´m capable of creating a GDL script capable of creating GDLs.

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