The message "Too Long String - nnnn" appears in trace files in cases where a single text field's content is too long, and would cause problems in trace display. If you see it only in trace then that's fine, and the actual value should be available in runtime.
If you're having some problem with "Create Text from Template", which you want to trace, try using a smaller template, and as always if all else fails create a sample application, and post it.
If you see this message elsewhere (such as an exception in the log), please provide more details/a sample app.
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