[GAP Forum] "SimpleGroup" command

[Sara Dikson]

Dear Forum
I used the "SimpleGroup("J4");" command for the Janko group.
But Gap can't recognize it. Also I used "AtlasGroup("J4");" but it return
"fail". I try it for "J3" but it return "fail".​
 errorg.png
<https://drive.google.com/file/d/0ByRpdyuq_c_ZdkJ3Q2xnMXpLMFE/view?usp=drive_web>
​
How can I access to all simple groups?
I send the error as  an attachment.
Best regards
Sara