ADABAS-D documentation

Product/components used and version/fix level:

ADABAS-D Ver 15

Detailed explanation of the problem:

I am looking for ADABAS-D documentation & if possible free download

Error messages / full error message screenshot / log file:

Question related to a free trial, or to a production (customer) instance?

It’s a great secret ))). I dont understand why SoftwareAG deletes docs for old versions and old products.