There is a General Class D Airspace in Skydemon for Croatia. This is a bit of a nuisance because warnings for this airspace will pop up and stay on top of the warnings for the actual airspace (In this example Pula TMA with Pula Radar on 124,600).
I presume this General Class D should represent the CTA Zagreb as in AIP ENR 2.1.2, but there is stated:
CTA ZAGREB covers the airspace
within the following limits:
Lateral: FIR Zagreb (See remarks)
• Upper limit: FL 660
• Lower limit: 1000 FT AGL(Outside TCAs nad CTRs)
CLASS OF AIRSPACE OUTSIDE
OTHER REGULATED AIRSPACE:
• C - above FL 115
• D - BTN FL 115 and 1000 FT
So this would be valid only outside of the TMA Pula which would remove the blocking of the real airspace warning.
There also is no Frequency linked to this General Class D Airspace in SD