Hi Vinnie
There is a thread on the Clarion10 newsgroup called "systemstring.ing missing" which seems to indicate that it is a problem with Clarion PE looking for inc's and clw's from the new mail classes even though PE doesn't have them.
One of the solutions was
On 5 Mar 2015 03:36:49 -0500, Sandro Gasparetto
<sandrogsp@virgilio.it> wrote:
> in my PE edition "systemstring.inc" is missing and apparently is
> required, because I cannot compile my main data-export application.
>
> Digging into clarion10 sources, I see that systemstring.inc is only
> needed in Clamail.inc (the new mail templates).
I found a quick & dirty solution :
I removed Clamail.* ( I won't us it anyway)
and now finally I have been able to compile with C10 PE