If you are using any Syscoin wallet from before Syscoin 3 you may experience issues sending your SYS to an exchange. These coins are not lost! There are a couple work arounds to recover the coins. 


Why does this happen?


Syscoin 2.x and previous generations are on a separate chain than Syscoin 3.x and above. If you did not upgrade to Syscoin 3.x any transactions made after May 1, 2018 will be invalid. 


How do I fix this?


First you will need to do a dumpwallet procedure as directed by this helpful guide by Syscoin Community Member JohnP! This entails:


  • Dumpwallet from Syscoin 2.x
  • Import the resulting dumpwallet file into a Syscoin 3.x wallet


Important: If you have tried to upgrade already, but did not complete the dumpwallet procedure prior to upgrading, you will need to revert back to Syscoin-Qt 2.x to resolve the issue. 


If that does not work 


  • Uninstall and reinstall:
    • Backup your wallet.dat
    • Uninstall Blockmarket Desktop 3.x
    • Install Syscoin-Qt 3.x
    • Allow the system to fully sync
    • Reinstall Blockmarket Desktop 3.x
  • Check your firewall and router settings