SQL5011 with multi row fetch and integer type in Data structure

I have the following declaration and then fetch statement. When I define
TOTIND as a 3u 0 (meaning unsigned integer) or a 3i0 (signed integer), the
compiler gives me SQL5011. But, if I define TOTIND as 3p 0 (packed 3,0) it
compiles fine. Does anyone know what rule I'm breaking by using an integer
here? The declare statement is going to be feeding a GROUPING(FIELD)
function into this variable. Also, if I don't use multi fetch, instead
just fetching 1 row at a time, its fine.

Fails:
D C1arr DS qualified dim(100) INZ
D PROD 35
D DESC 50
D ITYP 2
D TotInd 3u 0
D Market 5
D Sales 19 7
D
exec sql fetch C1 for 100 rows into :C1arr;

Good:
D C1arr DS qualified dim(100) INZ
D PROD 35
D DESC 50
D ITYP 2
D TotInd 3p 0
D Market 5
D Sales 19 7
D
exec sql fetch C1 for 100 rows into :C1arr;


Good:
D C1arr DS qualified dim(100) INZ
D PROD 35
D DESC 50
D ITYP 2
D TotInd 3p 0
D Market 5
D Sales 19 7
D

exec sql fetch C1 into :C1arr;