Change parametr from window to door window

[Anonymous]

Hello, 

have a problem change window parameter to door window. 

At fisrt I cancelled heater (calorifero). 

When try to change height sill (davanzale) it give me this problem. 

It's depends on the formula for H heater ( h heater = h sill - 169+131)?

If unlock the two parameters go but I can't put 0 for h heater. 

[Alfredo_Medina]

The height of the sill is too low: just 20 millimeters. Therefore 20 - 131 -169 produces the invalid value, -280, therefore Revit can't make the type with that negative value.

By the way, if you are interested, there's a forum for Revit in Italian at this link: http://www.cad3d.it/forum1/forums/41-Revit

[Anonymous]

Thank's for information. 

But I deleted the heater. 

Is however a problem?

Anyway if I click to skip the problem revit goes on next without problem.

Thank's for italian forum. 

Next days I saw that. 

[Alfredo_Medina]

Try deleting that formula if you don't need it, and the dimension that relates to that parameter. 

[Anonymous]

No I delete the heater in family. This is the reason because I ask the reason of relation with the sill. 

However click delete type it's gone. 

Thank's!

[Alfredo_Medina · Accepted solution]

You deleted the heater, yes, but you probably left a dimension there, in the view, maybe a dimension that was moving a reference plane, and the formula was trying to move that dimension in the opposite direction, to a negative value, which was not possible. It is important to understand the reason for the problem, not just delete things without understanding, that´s my point. OK...

[Anonymous]

Answer very comprehensive. 

Thank's