[Xymon] BBALPHAMSG Size Truncated

Is there a location to set the max size of BBALPHAMSG?

Since upgrading from 4.21 to 4.3.18, email alerts with large $BBALPHAMSG are getting truncated

If I output $BBALPHAMSG to a text file named al1.txt and then examine it:

Linux word count (wc) shows newline, word, and byte counts wc al1.txt 55 247 4075 al1.txt

Thanks Steve