Python DOP question

[asnowcappedromance]

If I create a Python DOP node and try to access subData, for example "Impacts"'s "Impacts" I always get an error message like

"Attribute Error: 'NoneType' object has no attribute 'record'.

That is obviously due to the fact that on frame 1 of the simulation there is no Impact data yet. How can I make Python understand that it should

only start creating subdata variables if a collision has already happened ?

I'm basically iterating through dop objects in my scene doing something like this:

objects = hou.pwd().objectsToProcess()

for i in objects:
    impacts = i.findSubData("Impacts")
    subdata = impacts.record("Impacts")

thanks,

Manuel

[sam.h]

imapacts should be None, so you can test it:

for i in objects:
    impacts = i.findSubData("Impacts")
    if impacts != None:
        subdata = impacts.record("Impacts")
    else:
        whatever

[asnowcappedromance]

imapacts should be None, so you can test it:

for i in objects:
    impacts = i.findSubData("Impacts")
    if impacts != None:
        subdata = impacts.record("Impacts")
    else:
        whatever

That's it ! Thanks Sam !