Experiencing this with ORCCA. But you can see in the sample article that if you:
find an exercisegroup/exercise
add to it a hint, answer, and solution
run xsltproc --stringparam exercise.divisional.hint no --stringparam exercise.divisional.answer no --stringparam exercise.divisional.solution no ../../xsl/mathbook-html.xsl sample-article.xml
The output will be showing the hint, answer, and solution despite all the "no"s. This is probably HTML only, since I recently built ORCCA's PDF and the solutions were not appearing in print. Solutions are appearing in HTML. Curiously, it seems they only appear in HTML for non-WW exercises. Since most ORCCA exercises are WW, it took a while for us to notice this.
Experiencing this with ORCCA. But you can see in the sample article that if you:
xsltproc --stringparam exercise.divisional.hint no --stringparam exercise.divisional.answer no --stringparam exercise.divisional.solution no ../../xsl/mathbook-html.xsl sample-article.xml
The output will be showing the hint, answer, and solution despite all the "no"s. This is probably HTML only, since I recently built ORCCA's PDF and the solutions were not appearing in print. Solutions are appearing in HTML. Curiously, it seems they only appear in HTML for non-WW exercises. Since most ORCCA exercises are WW, it took a while for us to notice this.