BIP desktop :Could not find the main class. Program will exit

[admin]

If you are developing XML report in BI Publisher using word and you get the error "BIP desktop :Could not find the main class. Program will exit". Then open Word and in menu open BI Publisher and click options > Preview and check Java version. It should be min 1.8 and a few other settings to work with 12.1.3 etc

According to the certification matrix to use 12.2.1.3.0 desktop with certified java need to install java 1.8.0_131+ it won't work on 1.6 or 1.7 .

Installation and configuration of Oracle BI Publisher Desktop with Oracle E-Business Suite Release 12.1 and 12.2 ( Doc ID 2386063.1 )

1.3 Supported Microsoft Office Releases for Oracle BI Publisher Desktop

Oracle BI Publisher Desktop 12.2.1.3.0 is certified with the following Microsoft Office releases:

Microsoft Office 2016
Microsoft Office 2013
Microsoft Office 2010

For more information, see the Oracle Fusion Middleware 12c (12.2.1.3.0) certification matrix (Interoperability sheet).

2.3 Configuring Oracle BI Publisher Desktop

Complete the following steps to configure the BI Publisher Template Builder for Word Add-in:

In Microsoft Word, click on the BI Publisher tab.
In the Options group, click Options.
In the pop-up that is displayed, click on the Build tab.
Under Form field size, select the Backward Compatible radio button.
Unselect the Generate XSLT 2.0 compliant code checkbox.
Click OK to save and apply these changes.

If in menu BI Publisher does not appear by default then

1. Open the run prompt – Windows + R and type regedit
2. HKEY_CURRENT_USER\SOFTWARE\Microsoft\Office\Word\Addins\TBAddIn
3. Look for the DWORD value named LoadBehavior
4. Seto value 3