error: {u'message': u'64 non-manatory-script-verify-flag (No error)', ucode': -2

[bitedge]

Electrum 2.4.2 on windows

I have attempted to make 2 transactions to valid address for amounts less than my wallet balance. After the broadcasting transaction window comes up for a second I get

error: {u'message': u'64 non-manatory-script-verify-flag (No error)', ucode': -2

And the transaction does not send. What can I do to fix this? Thanks if you can help

Edit: update to 2.5.1 fixed this

[torusJKL]

You should upgrade to Electrum 2.5.1 or higher.

Or you could try to use a different electrum server. e.g. electrum.no-ip.org.