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19-Tanzanite
Jan 21, 2026 1:54 PM UTC
Solved

Why variable result is not updated in this scenario?

Hi,

Cornel_0-1769003749623.png


Then I overwritten values for t1 and t2 and test variable result was updated with the new values of t1 and t2:

Cornel_1-1769003799198.png


Then I disabled t1 and t2, but the test variable remained unchanged. Why t1 and t2 did not took value 2 and update the test variable result with 4?

Cornel_2-1769003816061.png

 

o.svahnAnswer
12-Amethyst
Jan 22, 2026 10:30 AM UTC

Solved in Prime 11.01

 

Owe

11 replies

Werner_E
25-Diamond I
Jan 21, 2026 2:18 PM UTC

Why t1 and t2 did not took value 2 and update the test variable result with 4?

Because Prime is buggy!

 

I can confirm that I experience the same faulty behaviour (Prime 11, with auto calculation turned on).

Only after an explicit recalculation of the sheet (Ctrl-F5) the result updates correctly.

For the bug to show up its necessary to disable both variables at the same time!

Werner_E_0-1769005695405.png

As we can see the variables a and b actually are updated correctly, its the assignment of variable test which is not updated.

 

Feel free to report this bug to official PTC support. Good luck!

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Cornel19-TanzaniteAuthor
19-Tanzanite
Jan 21, 2026 3:28 PM UTC

Beside Prime 11, I tested this situation also in Prime 9 and Prime 10.0.1 and the same behavior is happening also in these latter two versions... 

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Werner_E
25-Diamond I
Jan 21, 2026 3:35 PM UTC

Yes, it seems to be a rather old bug.

I traced it back to Prime 5.

In Prime 4, the behavior is still OK as it should be.

You can mention this if you decide to report the bug officially.

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