My witness is up and producing blocks using the jscript method. I was getting this error message for a while, but it has stopped now that the blocks have caught up.
Also I think I built from commit a748883fed08a73afaec647e2e8827d07ca3c163 (still learning git, used "git show" in graphene directory)
!!! GrapheneApi error: broadcast_block [ { previous: '0001d8a6de1024e6b4a7105304cd54fc1504c300',
timestamp: '2015-09-08T23:55:35',
witness: '1.6.51',
transaction_merkle_root: '0000000000000000000000000000000000000000',
extensions: [],
witness_signature: '1f427c6e912ce2fcd712baf356e37fe1bc5f6b09736fcb500bda3d73450d4119ad442af6b640182618da8095a0a6cdb12aa7e5f42ab029c0ca7e00f8910336318c',
transactions: [] } ] { code: 1,
message: '10 assert_exception: Assert Exception\nitem->num > std::max<int64_t>( 0, int64_t(_head->num) - (_max_size) ): attempting to push a block that is too old\n {"item->num":120999,"head":121012,"max_size":13}\n th_a fork_database.cpp:70 _push_block\n\n {"new_block":{"previous":"0001d8a6de1024e6b4a7105304cd54fc1504c300","timestamp":"2015-09-08T23:55:35","witness":"1.6.51","transaction_merkle_root":"0000000000000000000000000000000000000000","extensions":[],"witness_signature":"1f427c6e912ce2fcd712baf356e37fe1bc5f6b09736fcb500bda3d73450d4119ad442af6b640182618da8095a0a6cdb12aa7e5f42ab029c0ca7e00f8910336318c","transactions":[]}}\n th_a db_block.cpp:176 _push_block',
data:
{ code: 10,
name: 'assert_exception',
message: 'Assert Exception',
stack: [ [Object], [Object] ] } }
on UpstreamBlock error: { code: 1,
message: '10 assert_exception: Assert Exception\nitem->num > std::max<int64_t>( 0, int64_t(_head->num) - (_max_size) ): attempting to push a block that is too old\n {"item->num":120999,"head":121012,"max_size":13}\n th_a fork_database.cpp:70 _push_block\n\n {"new_block":{"previous":"0001d8a6de1024e6b4a7105304cd54fc1504c300","timestamp":"2015-09-08T23:55:35","witness":"1.6.51","transaction_merkle_root":"0000000000000000000000000000000000000000","extensions":[],"witness_signature":"1f427c6e912ce2fcd712baf356e37fe1bc5f6b09736fcb500bda3d73450d4119ad442af6b640182618da8095a0a6cdb12aa7e5f42ab029c0ca7e00f8910336318c","transactions":[]}}\n th_a db_block.cpp:176 _push_block',
data:
{ code: 10,
name: 'assert_exception',
message: 'Assert Exception',
stack: [ [Object], [Object] ] } }