I'm just now updating existing code to Acad 2013 w/ ODCL v7.0.0.8, and I'm getting the attached error.
This code used to run fine in v6.0.2.5:
(setq ParKey (dcl_Tree_AddParent BX_frmBlkLibMain_TreeControl1 (cdr x) (car x) icon icon icon))
Is this "alternative syntax" no longer working?
http://www.opendcl.com/HelpFiles/index.php?page=Reference/Method/Tree/AddParent.htm (http://www.opendcl.com/HelpFiles/index.php?page=Reference/Method/Tree/AddParent.htm)
I could not reproduce the problem here.