sep_get_key_type - get the key type associated with an index
ierr= sep_get_key_type(tag_history,key_index,key_type)
tag of History File
Key Index of Header Key
Key Type of Header Key
-1= if fails for other reasons
0= if successful
+1= if tag_history is an Sep77 History File
+2= if tag_history is a Sep3d History File but no matching Key Index is in Header Format File
auxpar from the Header Format File for the parameter hdrtype"#" for a given key_index
sep3d