property “value” accessed on invalid node ,Error

[mkhorsandi64]

Hi 

When I run my model it is appeared an exception that property “value”  accessed on invalid node but I checked my labels many times ,I don’t know where is the problem . Please guide  me.

[joerg_vogel_HsH · Accepted solution]

Wherever you have found “>.” as string path reference for a starting point for a label this is not the metric for this. 

This is probably causing this error. 
You get access to a label for example by obj.labelname or obj.labels[“labelname”] or obj.attrs.lables.subnodes[“labelname”]
obj is in this case for example current. 
Please refer to the manual and do not assume something. The command node has been replaced by method find.