Thanks Michael, Forums and Attachments are available today but now I get two further errors :
* Forums 1.2.0d3 requires Attachments 0.5 (only Attachments 0.1 is listed)
* Attachments 0.1 requires File-Storage 4.6.2 (File-Storage is not listed as an available application or service, also maybe Attachments 0.5 needs a higher version of File-Storage ?)
Could someone do the necessary to make these items available for installation in OACS 5.2 ?