When installing OfficeWriter for SQL Server Reporting Services 2012 in SharePoint mode (SharePoint 2010), the OfficeWriter installer aborts with message:
SoftArtisans OfficeWriter Setup Wizard ended prematurely because of an error. Your system has not been modified. To install this program at a later time, run Setup Wizard again. Click the Finish button to exit the Setup Wizard.
Starting in SQL Server 2012, the SharePoint integration for Reporting Services was re-architectured: SSRS 2012 is configured as a shared service against SharePoint 2010. Configuration information is stored in a database and can be managed through SharePoint Central Administration or with Powershell.
Due to this change in architecture, the OfficeWriter installer is not currently equipped to run against SSRS 2012 in SharePoint integration mode. We will be adding support for this configuration to the OfficeWriter installer in a future release.
Update 4/11/2013: Instructions for manually installing OfficeWriter in this configuration are now available in our documentation: Manual Installation for SSRS 2012 with SharePoint 2010. The fix to the installer will be available in a soon to be released version of OfficeWriter.
This does not happen outside of SSRS 2012 with SharePoint 2010. OfficeWriter has full compatibility with SQL Server Reporting Services 2012 in native mode starting in v8.2. OfficeWriter also works with other combinations of SSRS and SharePoint.