Compiler error C0077

Message: Unknown type: '<data type>'

Possible error cause: Invalid data type in the declaration (maybe a syntax error)

Error correction: Specify valid data types only.

Example of the error:

PROGRAM PLC_PRG
VAR
	i : INTEGER;
END_VAR


--> C0077: Unknown type: 'INTEGER'

Error correction:

Example:
arr1 : ARRAY[1..2] OF STRUCT1 := (p1:=1,p2:=10);