I know that this post is very old. I have used this post, and similar, to change permissions on a list. Here is the scenario:
I a working on a main site. I have create a list of projects. After a project is approved, i create a sub-site and a new "source document" list. The "Source document" list will store all files sent for approval. I want to change permission of "Source document" list to read only for everyone, expect the creator. I use the web service permissions.asmx. Here is my config:
When i run my workflow, it create the site, the list but its raised error when it must change permission:
Can someone help me to fix this issue?