I am looking at the COMAPI for Sage 300 and am impressed that it can do things the web API cannot, such as create an invoice.

I notice the COMAPI is configured with the standard integration setup files found at https://support.na.sage.com/selfservice/viewdocument.do?noCount=true&externalId=101193&sliceId=1&cmd=&ViewedDocsListHelper=com.kanisa.apps.common.BaseViewedDocsListHelperImpl&noCount=true. You will find the files in the CustomPages/ACCPAC folder.

When calling the Accpac_rw.js file to open the connection, it successfully initializes but fails on open. I have double checked that the user ID, password and database are correct, they even work for the web screens integration.

Are these shipped files supposed to be working? Have you used these to connect to Sage 300 with recent versions of 300 and CRM, or have you used it with previous versions?