ID 427219 - Behavior change in checkDynamicParameters(), not retained in multiple Python instantiations

Problem summary:

Behaviour has changed around the checkDynamicParameters() function, and how and when it needs to be called. It appears it no longer is retained during multiple Python instantiations. 

Steps to reproduce:

1. In a new Katana project, copy and paste the following code into the Python tab.

from Katana import NodegraphAPIrootNode = NodegraphAPI.GetRootNode()newNode = NodegraphAPI.CreateNode('ArnoldShadingNode', rootNode)newNode.getParameter('nodeType').setValue('image', 0)newNode.checkDynamicParameters()newNode.getParameter('name').setValue('AAA', 0)newNode.getParameter('parameters.filename.enable').setValue(True, 0)newNode.getParameter('parameters.filename.value').setValue('BBB', 0)newNode.setName('AAA')param = newNode.getParameter('parameters.filename.value')print 'PARAM1: ', param, param.getValue(0)

2. Copy and paste the following code into the Python tab. Make sure to not set the edit flag to the newly created node before pasting the code.

node2 = NodegraphAPI.GetNode('AAA')print 'NAME:', node2.getName()print 'PARAM2:', node2.getParameter('parameters.filename.value').getValue(0)

Expected behaviour:

We should get a print out of the expected value: BBB

Actual behaviour:

In Katana 3.1v5, the function node2.getParameter('parameters.filename.value').getValue(0)​ will return "PARAM2: BBB" without the need of calling node2.checkDynamicParameters()

In Katana 3.5v1, the function node2.getParameter('parameters.filename.value').getValue(0)​ will return the following error: 

File "<string>", line 5, in <module>    print 'PARAM2:', node2.getParameter('parameters.filename.value').getValue(0)AttributeError: 'NoneType' object has no attribute 'getValue'

Calling node2.checkDynamicParameters()​ after node2 = NodegraphAPI.GetNode('AAA') or setting the edit flag to the "AAA" ShadingNode fixes this error.

Workaround:

No known workaround.

Tested versions/platforms:

• 3.1v7 - Unaffected
• 3.2v1 - Affected
• 3.2v3 - Affected
• 3.5v1 - Affected

Customer version/platform:

CentOS 7