How to rollback if a family can not make

Rhino.Inside Revit
,
1

Hi,

I am having an issue where I am trying to pass a parameter number into a curtain wall family- for a different reason- this family fails to build.

It then tells me that the family can not build and I should delete the type and replace the family (this happens with a revit box that pops up).

Is there a way inside rhino inside (or my python script) where I can see that it fails and then tell the script- actually I do not want to change the parameter (and in turn delete it).

Ideally I would just leave the family as is and record that there was an issue passing in the new parameter.

However, I want it to operate on all the ones it can make successfully, just not the ones that it cant.

Thanks

2

Hello,

What does the error look like? Is it raising an exception? Do you know about try...except blocks in python?

3

Hi Graham,

So I pass in my parameter and the python script runs.

Then I get this error once the script has run:

shot
shot1120Ă—703 28.8 KB

I then press delete and replace and it just changes by default to a blank panel and loses all its infomation.

With my script:

I first find the paramter and then I try and set it, I do this within a try:

My script is below:

f Trigger:

with DB.Transaction(doc, 'test') as t:
    t.Start()
    
    
    for count, element_ind in enumerate(Element):
        # Get the element name
        PanelName = element_ind.Name
        
        # Value for Element
        Current_Value = (Value[count])

        
        # Convert to correct revit units
        Value_Conversion = UnitConverter.InHostUnits(Current_Value, DB.ParameterType.Length)
        
        # Input Value
        Element_Input = element_ind.LookupParameter("Panel_AngleIntersection_Input")
        SetInput = Element_Input.Set(str(Current_Value))
        
        Element_Input = element_ind.LookupParameter("Panel_AngleIntersection_Error")
        SetInput = Element_Input.Set(str("Added"))
    
        # Find the Keys Parameter
        Element_Key_Value = element_ind.LookupParameter(Key)
        Element_Key_Value_String = Element_Key_Value.AsString()
        




        try: 
            SetValue = Element_Key_Value.Set(Value_Conversion)
            Element_NewValue = element_ind.LookupParameter(Key)
            
            # Pass out some information

            
           
        except:
            # This says if it cant get this value, then it sets 1000 instead
            #SetValue = Element_Key_Value.Set(1000)
            print("An exception occurred")
            #Parameter_List.append("error")

    t.Commit()
4

Out of my arena but i believe this will get you closer… SetFailureHandlingOptions Method

This was in one of Ehsan’s scripts…


class FailureSwallower(DB.IFailuresPreprocessor):
    def PreprocessFailures(self, failuresAccessor):
        failures = failuresAccessor.GetFailureMessages()
        for failure in failures:
            failuresAccessor.DeleteWarning(failure)
        return DB.FailureProcessingResult.Continue

# create and start the transaction
t = DB.Transaction(doc, 'Transaction Name')
fhndlr_opts = t.GetFailureHandlingOptions()
fhndlr_opts.SetFailuresPreprocessor(FailureSwallower())
t.SetFailureHandlingOptions(fhndlr_opts)
t.Start()
5

Excellent I will look into this- essentially I want a way to say if one of the families fails to make- roll that back… but keep trying to do the others and then commit.

6

you might have to get more particular in the error handling, but honestly not sure what’s possible.

https://www.revitapidocs.com/2015/376f0f4f-e1e0-f704-79cb-4d48ced78602.htm

this one might do it, no?

“Loaded family curtain panels cannot be used in non-rectangular cells of the curtain host. Type-driven panels from non-rectangular cells were unlocked and left unchanged.”

https://www.revitapidocs.com/2015/14ce6ee2-999d-0221-c008-725016fc6de4.htm