Is there any problem with synchronizing it fully and/or upgrading it?
Right click on the transaction and select Copy Raw transaction. Go to coinb.in/#broadcast and paste the data there. It should broadcast without errors, if there is, let us know.
Thank you, ranochigo, transaction is now broadcast
. To answer your question, no there is no problem with updating and synching it, I just didn't do it.
The wallet is version 0.15xx and runs on Win10. It is not fully synchronised
Bitcoin Core can't show your recent transactions when it's not synced. My advice: Exit Bitcoin qt, backup your wallet.dat, upgrade Bitcoin qt/Core to the latest version, let it fully synchronize.
Thanks for your advice. Would have been the next step, if above advice didn't work