I tried to decompile (Pseudocode) a big function into binary with Ida Pro 7.7 but I got error :
The graph is too big (more than 1000 nodes) to be displayed on the screen.
Switching to text mode.
(you can change this limit in the graph options dialog)
What can I do to decompile that function?
After some digging around it seems that in later versions of IDA it's possible to adjust the parameter under Options->General->Graph->Max nodes. However in the free version this options wasn't introduced. I hope this helps.