GnuCash crash on txf export

[TPack]

gnucash crashes when attempting to export a tax report in txf format.

Description: Ubuntu 18.10
Release: 18.10
*********************
gnucash:
  Installed: 1:3.3-2
  Candidate: 1:3.3-2
  Version table:
 *** 1:3.3-2 500
        500 http://us.archive.ubuntu.com/ubuntu cosmic/universe amd64 Packages
        100 /var/lib/dpkg/status
****************************************

Output from running from the command line is as follows:
Backtrace:
           9 (apply-smob/1 #<catch-closure 55c4cdaaf1e0>)
In taxtxf.scm:
  2997:42 8 (generate-tax-schedule _ _ _ #f "/home/tom/2018_02.txf")
In srfi/srfi-1.scm:
   592:29 7 (map1 ((("") ("1") ("") ("N000") ("Expenses:Business Expenses") (#<swi…>) …) …))
   592:29 6 (map1 ((("") ("1") ("") ("N000") ("Expenses:Business Expenses:Banking") # …) …))
   592:29 5 (map1 ((("") ("1") ("") ("N000") ("Income:Self Employment") (#<swig-po…>) …) …))
   592:29 4 (map1 ((("") ("1") ("") ("N000") ("Liabilities:Loans:Education Loan") (#) …) …))
   592:17 3 (map1 ((("F1040") ("1") ("28") ("N517") ("Expenses:Insurance:Health In…") …) …))
In taxtxf.scm:
  2335:36 2 (handle-tax-code _)
   590:37 1 (render-txf-account _ 169693/10 #f _ #t _ _ N517 "1" "F1040" #f)
In unknown file:
           0 (_ #f "!0,2f" -16969.3)

ERROR: Wrong type to apply: 1