-- FreeFem++ v4.6 (Thu Apr  2 15:47:38 CEST 2020 - git v4.6)
 Load: lg_fem lg_mesh lg_mesh3 eigenvalue 
 Error opening file convective_rolls.edp in: 
  -- try  :"convective_rolls.edp"
  -- try  :"/usr/local/lib/ff++/4.6/idp/convective_rolls.edp"

 Error line number 1, in file -- unkown --, before  token 
lex: Error input opening file 
  current line = -1
Compile error : lex: Error input opening file 
	line number :1,