System Error prevent a visa grant: HOW OFTEN??
 

Hi
My application RSMS so far has been smooth. The case officer emailed me last week telling that everything is fine with the application, but the system error has preventing him to make a decision (i.e. grant the visa). I have been waiting for more than a few days (excluding the weekend), but still got no news from him.

I cant believe that it's so close but yet not having the visa is mentally wrecking...

What type of system error that prevent the grant of visa, is this common?