This article provides a solution for the following error message:
Error
Assembly containing type Lasernet.WebService7.LnWebServiceSoapClient is not referenced.
This occurs if you try to retrieve printers or printer profiles in AX from the Lasernet server. The problem is related to a mismatch between the Lasernet C# project and the Lasernet Webservice, normally because of upgrading the Lasernet server from version 6.6.x to 6.7.x or later.
Resolution
This can be resolved by manually adding the printers or printer profiles. This is fixed from Lasernet Connector for AX 2012 3.3.x.x.