It was a transaction that was broadcast but, for whatever reason, was never confirmed on the blockchain... there is no record or history of it. You could try and get the raw transaction (use getrawtransaction b5cdb9ddfa95b92fbacc3d4d34e829680f953d8e06871ba6d8d714b941f5bb68 command on the help -> debug window -> console)... and then try rebroadcasting (sendrawtransaction CopyPasteTheHexFromGetRawTransaction)...
Chances are the inputs have already been spent in other transactions... but you never know
![Wink](https://bitcointalk.org/Smileys/default/wink.gif)
When I use command 'getrawtransaction b5cdb9ddfa95b92fbacc3d4d34e829680f953d8e06871ba6d8d714b941f5bb68' , it says:
No such mempool transaction. Use -txindex to enable blockchain transaction queries. Use gettransaction for wallet transactions. (code -5)
Is there anything else I can do?
Thanks.