HTMLDialog vs WebDialog?

[Dan Rathbun]

@medeek said:

The error codes posted above.

... are occurring (according to your error messages,) in " medeek_roof_truss.rbs", line 5726, in callback method onLButtonDown.

In the first you are calling a *() method upon an object that is referencing the global singleton nil object. Since the NilClass does not have an "asterisk" method, a NoMethodError is raised.

The second method is caused by your code expecting a Float object, but getting a String object instead.

The answer is simple. Whenever an object reference could reference disparate types (classes) of obejcts, use a combination of type validation and Ruby rescue clauses with the onLButtonDown callback method.

[medeek]

Okay 95% of that just went over my head, but I'll try and decipher into terms I can understand.

But why would this error only be raised for SketchUp running on MacOS and not Windows?

[Dan Rathbun]

Basically I'm trying to prompt you to learn how to read Ruby error and backtrace messages.
“filename:lineNo: inmethod”‘ or “filename:lineNo.”`

http://ruby-doc.org/core-2.2.4/doc/syntax/exceptions_rdoc.html
http://ruby-doc.org/core-2.2.4/Exception.html

@medeek said:

Okay 95% of that just went over my head, but I'll try and decipher into terms I can understand.

Data validation - Wikipedia

(en.wikipedia.org)

An example in Ruby of testing if an object reference is pointing at an object of a certain class:
if obj.is_a?(NilClass)
... or ...
if obj.is_a?(Float)

An example in Ruby of validating that an object reference call responds to a certain method call:
if obj.respond_to?(:methname)
... and testing for the "asterisk" method specifically:
if obj.respond_to?(:*)

@medeek said:

But why would this error only be raised for SketchUp running on MacOS and not Windows?

I don't know (offhand) as I avoid Macs myself. (But OSX and MS Windows use different sets of keycodes.)

Actually, looking at the backtraces (in your original error listing) the errors are kicked off by a LButtonDown keypress, but are occurring in the `` create_timber_geometry()`' method, lines 1064 and 1355.