Using Alan Campins iDate

Hi everyone
Before I forget, we are on V7r1

I installed Alan Campins idate function onto all of our systems many years ago
There is absolutely nothing wrong with this software, and it has been a godsend in many cases

Here is my situation
We have data in a file that hold the date in separate character fields
One field for Month (mm format)
One field for Day (dd format)
And
One field for year (ccyy format)
The system is decades old, and that is why I am using iDate
However, a lot of the results of iDate, do not translate, and they shouldnt
For example - the string is 20164119, or 20162118 are NOT valid dates

My question is, using idate, how can I display JUST these records
I have tried
SELECT REC_DATE, WONUM FROM examplea where rec_date isnull
Where rec_date is the result of iDate, but Token ISNULL was not valid is the result of that query

I hope what I wrote makes sense

As always, all answers are gratefully accepted


Alan Shore
E-mail : ASHORE@xxxxxxxx
Phone [O] : (631) 200-5019
Phone [C] : (631) 880-8640
'If you're going through hell, keep going.'
Winston Churchill