As marto pointed out, we would need to see some code and the pp command options that you used to create the executable in order to provide any useful suggestions.

In the absence of more details, here's my guess as to what may be the issue. The pp utility tries to figure out which modules/libraries/etc that your code needs and bundles it into the executable. But sometimes it misses some items and you need to manually tell it to include the missing items.

I suspect that something (probably unicode related) is getting missed by the pp utility. If you're not doing so already, I'd recommend using the -x and/or the -c options for pp, which will "determine additional run-time dependencies".