Thread:Semantic-mediawiki.org:Community portal/Query on specific value of Geographical coordinate type property returns nothing/reply

[[Has coordinates::]

Ahh, don't do that... The property annottaions already accepts all the formats, no need to reformat first. And if you do want to reformat, then I suggest keeping display and setting of the property seperate (ie setting it using set). Also keep in mind you can set the default display format of coordinates in annotations, so perhaps you don't need any wikitext for it at all.

the query returns with nothing

Hmm, it should...

"Fatal exception of type MWException"

Need more info, for instance a stack trace.