Constraints between geometry in the family can behave unpredictably on parameter modification

[Anonymous]

hi

i need little help

i try to add parameter in generic line based family it failed and said :

Constraints between geometry in the family can behave unpredictably on parameter modification. To make the family reliable, constrain geometry to levels, reference planes, or reference lines.

anyone knows how to fix it ?

[barthbradley]

post what you've got and we'll fix 'er up for you -- and advise you on what's going on. fair enough?    

[barthbradley · Accepted solution]

I think I answered this on your other thread.  

array this in generic model line based - Autodesk Community - Revit Products

Basically, examine the family I posted and look at how the first two instances are aligned and locked -- and hosted. 

[Anonymous]

yeay Thanks a lot it does help 🙏