Error running "Variant Call tool"

I’m trying to use “Variant Call tool” and whenever i execute the job it won’t finish !
I waited for more than an hour and the job status is still “This job is waiting to run”
What should i do ?

Hi Fatima,
well, just keep waiting a bit longer. When exactly a job will start running depends on many factors like which job queue it’s in and how long that queue is.
In addition, if the input dataset for your job (which you don’t show in your screenshot) is not yet ready or is in a format that needs to be converted first to a format that the next tool understands, the job will also stay in the grey state until the upstream processing is finished.

I waited for more than 4 hours and still the same nothing changed