"Croatian President Stipe Mesic warned Slovenia on Thursday not to block his country's European Union membership bid as such a move could seriously harm ties between the two neighbours.
'If Slovenia prevents our entry into the EU by persistently insisting on its attitudes, it will be a disaster for our future relations,' Mesic said.
Such a scenario would mean that any 'friendship between Slovenia and Croatia is over for good,' he added.
The Croatian leader is to have an informal meeting on Friday with his Slovenian counterpart Danilo Turk, for the first time since Turk was elected in November.
Asked by journalists what he expected from the talks, scheduled to be held in Slovenia, Mesic emphasised they would be informal to give them a greater chance of success.
Croatia accuses its northern neighbour of using its current six-month term in the EU presidency to press Zagreb over unsolved bilateral issues. Slovenia has rejected the charges."