Stuck with an SQL error

I'm stuck and I hope someone on the list can help me.

I have this as part of a SQL select statement:
"timestamp(CHAR(T01.MIDTSY) || '-' || substr(digits(T01.MIMTIM),1,2) || '.' || substr(digits(t01.MIMTIM),3,2) || '.00') as Message_Timestamp"

When I run the select statement using Run SQL Scripts out of IBM Access Client Solutions I get back the row I expected with a timestamp that looks like this: "2018-03-16 15:35:00.000000"

When I embed the same select into an RPG ILE program, I get this error and I can't see why:
"Select or omit error on field Cast(Concat(Cast(RBAMI_1.MIDTSY AS Char(8) CCSID 37),'-',Substr((Cast(ABS(RBAMI_1.MIMTIM) AS Numeric(4,0))),1,2),':',Substr((Cast(ABS(RBAMI_1.MIMTIM) AS Numeric(4,0))),3,2),':00') AS TimeStamp) member RBAMI."

The second level text says:
Cause . . . . . : A select or omit error occurred in record 1, record format *FIRST, member number 1 of file RBAMI in library RBTALRLIB, because of condition 6 of the following conditions: ... 6 - A data mapping error occurred on the field before the select or omit operation was attempted."

I know I probably have a setting wrong in my RPG LE program but I am at a total loss as to where to look. Why would RPG LE be interpreting the statement differently than Run SQL Script?

Respectfully,
Kendall Kinnear
System Analyst
Standard Motor Products, Inc.
Mobile: 940-293-7541

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