NETFILE - "You have an amount of lump-sum pension accrued to December 1971."You have received this message because you have entered an amount in box "(110) DPSP accrued to December 31, 1971" in the section "Pension income, T4A, split pension" - >"T4A - Pension, retirement, annuity and other income".
You cannot use NETFILE to file your tax return if you are reporting a lump-sum pension income accrued to December 31, 1971. This is a CRA restriction:
http://www.netfile.gc.ca/rstrctns-eng.html
ID: 20131028155612NI.xml
Webpage: KPA210-20131028155612NI.htm