BCS metadatastore unavailable

Hi,

I have been useing BCS and ECT (SPD2013) for months without any problems (except for a few weeks ago, where there was an issue with 365/ect's).

Since two day's I receive an error message in SPD 2013 "bcs metadatastore currently not available").

I know how it works; creating secure store application: no problem. Permissions in BCS: no problem, all seems to work fine. But SPD 2013 gives an error??

Anyone having the same problems? Any help? (It looks like the same problem a few weeks ago!)

Thanks in advance,

Ton.