Strange behaviour of Appearances.addByCopy method

[VismantasKizelis]

Hello

Working on add-in for Fusion360 I found a strange behaviour of Appearances.addByCopy method.

I work on Windows 10 machine. The same bug reproduces on both c++ and py scripts

Steps to reproduce:

1. Open some document
2. Write the script to copy any appearance from library to current design using Appearances.addByCopy method
3. Copy the same appearance several times providing different display name each time

Results:

1. Sometimes everything wokrs as expected
2. Sometimes adding new copy of appearance to design overwrites another appearance that was added previously
3. Sometimes new name is ignored and appearance is added to design with original name

In screencast you can see, that same script, that should add six appearances to design, in first document adds three appearances, in second and third documents adds two appearances (but one appearance has wrong name), in other documents script acts as expected. 

83f6ecea-41bb-4023-b545-bbcecae0f4b4

Do not know why screencast does not show, so here is the link https://autode.sk/2so4YeR

py script:

import adsk.core, adsk.fusion, adsk.cam, traceback

def run(context):

ui = None

try:

app = adsk.core.Application.get()

ui = app.userInterface

materialLibs = app.materialLibraries

matLib = materialLibs.item(1)

appear = matLib.appearances.item(0)

des = adsk.fusion.Design.cast(app.activeProduct)

#Next lines should add six appearances to current design

des.appearances.addByCopy(appear, "A")

des.appearances.addByCopy(appear, "A1")

des.appearances.addByCopy(appear, "A2")

des.appearances.addByCopy(appear, "A3")

des.appearances.addByCopy(appear, "A4")

des.appearances.addByCopy(appear, "A5")

except:

if ui:

ui.messageBox('Failed:\n{}'.format(traceback.format_exc()))

[marshaltu · Accepted solution]

Hello,

Thank you for reporting the issue to us. UP-39107 has been logged to track the issue in our internal system.

Thanks,

Marshal