String Null Value when connected

1

I have rather a long script, right when i finally got it all working, the first string defaults to a null value, this happens only if it is connected to the rest of my script. Anyone come across this before?

NullString
NullString.png979×720 82.7 KB

The packages i have installed and am using are the following
DynamoPackages

2

Using Revit 20.1.0.81 and Dynamo Revit 2.1.0.7733

3

why don’t you use these
path

4

Well the file currently may or may not exist. I used the directory to call for a file that doesn’t exist, and it seems to function even less. Its says that the run has completed, but there is a null output that a watch node wont even show as an null.

filepath
filepath.png1122×742 97.9 KB

It seems like there is a corruption in the file for the string text to show a null value. Has anyone solved a corruption of this sort?

5

It looks like the ScopeIf node was the culprit. I made a simpler script with only Dynamo native nodes to track down the issue. Looks like with the ScopeIF there is a null value.

scopeif
scopeif.png1592×757 147 KB

and without the scopeIf the string will write a value.
noscopeif
noscopeif.png1601×654 139 KB

I had added this to my script to remove the warning messages when the list.filterbooleanmask path was the other option.

1 Like