why data translate error when selecting from view?

why would selecting from a view result in a data translate error when I am
able to select all the rows and columns of that view and copy to another
table? ( the view has a WHERE clause which selects rows with valid data )

table CONTR has a customer number that stored in a character field. And
some of the values in that char field are not all digits. So I create a
view that selects only the rows where that customer number field actually
contains a customer number. And in the view, I convert the character cust
number field to a decimal field.

I prove this works by creating a new table by selecting all rows from the
view:
create table aplusb1fcc/contrpx as (
select a.* from contrv1 a
) with data
Table CONTRPX in APLUSB1FCC created but was not journaled.

but when I select from the view I get an error:
select a.itcd, a.itno, a.startDate, a.expireDate
from contrv1 a
where a.csno = 1346100
and a.expiredate >= current date
Selection error involving field *N.

Select or omit error on field Cast(Translate(CONTR_1.CPCSID, *UNNAMED
Table) AS member CONTRV1.

here is the view:

create OR REPLACE view aplusb1fcc/contrv1 as
select a.cpcono cono,
case when length(trim(a.cpcsid)) = 10
then decimal(a.cpcsid,10,0)
else decimal(0,10,0) end csno,
a.cpitcd itcd, a.cpitno itno,
a.cpprcd prcd, a.cpngpr ngpr,

DATE(digits(a.cpstcc) || substr(digits(a.cpstdt),1,2) ||
'-' || substr(digits(a.cpstdt),3,2) ||
'-' || substr(digits(a.cpstdt),5,2)) startDate,

case when a.cpexdt = 0 then date('2050-12-31')
else
DATE(digits(a.cpexcc) || substr(digits(a.cpexdt),1,2) ||
'-' || substr(digits(a.cpexdt),3,2) ||
'-' || substr(digits(a.cpexdt),5,2)) end expireDate,

a.cpcnqt cnqt, a.cpprbk prbk

from contr a
where length(trim(a.cpcsid)) = 10 ;