Hello Jarno,
Great thanks for your help.
I checked again my plugin with DITA-OT 2.4.2 and it worked fine. So I compared the DITA-OT build.xml file for the two DITA-OT versions and I found that there is a difference :
In the build.xml DITA-OT 2.4.2 all the plugins are imported, but in the build.xml DITA-OT 2.4.5 only the 3 first imports are present :
<import file="plugins/org.dita.base/build_init.xml"/>
<import file="plugins/org.dita.base/build_preprocess.xml"/>
<import file="plugins/org.dita.html5/build_dita2html5.xml"/>
That is to say that my plugin integration with DITA-OT 2.4.5 was not completed (but no error raised when I launch the integration with the command line).
I solved my integration problem with launching twice the command "dita --install" from 2 different directories : the first time from the dita-ot directory, the second time from my plugin directory. Of course the path environment variable is set to the dita-ot/bin directory.
I hope that this will help. I will send you my plugin by e-mail.
Regards,
Marie