Hello, How can i change that it should get increment forward not backwart…? [2021-02-25_14h22_43] KR Andreas

flip the formula and use reverse List.Reverse(x .. 9000) or you can use -1 9000 .. x .. -1;

[2021-02-25_14h31_07] hmmmmm 9501,9502,9503,… i count generic-model-instances

i may understand you wrong, what is the desired list should be ? for example ?

that the count of the elements start by 9501 and ends with (9500+619=10.119) the later issue is numbering openings!

The range syntax is from…to so you could just do this: [image]

so it is started with 9500 and increased by 619 , 9500…10119 … 10738 …etc. but is should end at what number ? i mean what is the last value ?

cc @Michael_Kirschner2 This is a bit of contradiction: [image] ? Logically, if I start at 10 and end at 1 and want to increment in steps of 1 this should work. And -1 would cause the exception? [image]

[2021-02-25_14h44_07] got It! thank you!

[image] Counting code block Revit For future reference, here are the standard nomenclatures for different sequence patterns: [image] Generally, i is the initial value, j represents the number of steps, and n is the step value. Using a # changes the value to a count. 0..…

I read the error state as ‘start at 10 and keep adding one until you get to 1’ which doesn’t ever get to the goal as you’re moving the wrong direction, while the working state I read as ‘start at 10 and keep adding negative one until you get to 1’, which actually happens as I am moving the right dir…

Counting backward, why?

Lists-Logic

Nick_Boyts February 25, 2021, 5:22pm 10

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Counting backward, why?

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