What is the type of hdf2mergedcbf' ?
hdf2mergedcbf' :: Path Abs File -> Int -> Int -> IO ()
Does it work if you write `void (hdf2mergedcbf' (head masters) 1 1)` ?
nop • In the expression: void (hdf2mergedcbf' (head masters) 1 1) In a case alternative: (SomeDataCollection SCollect SHdf5 _) -> void (hdf2mergedcbf' (head masters) 1 1) In the second argument of ‘($)’, namely ‘case col of { (SomeDataCollection SCollect SHdf5 _) -> void (hdf2mergedcbf' (head masters) 1 1) }’ | 184 | (SomeDataCollection SCollect SHdf5 _) -> void (hdf2mergedcbf' (head masters) 1 1) | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ HsCompilation exited abnormally with code 1 at Fri Nov 29 19:23:04