electroneumd.exe Fails to start https://imgur.com/K0qIz9Z about electroneum

[electroneumRepo]

Hi @eugeneccnp,

Seems that your copy of blockchain has become corrupted.
Unfortunately this means you are going to have to delete your copy and then re-sync.

You should first stop the daemon, then delete the electroneum directory C:\ProgramData\electroneum

Once deleted, start the daemon and wait for it to re-sync.

Apologies for the inconvenience

[olddog59]

How is this done on Ubuntu 16, please?

[electroneumRepo]

@olddog59 Apologies for the delayed response, the data directory on linux / mac systems is in the users home directory in .electroneum

[sfc1974]

Can you please ...
I sync the blockchain for the first time and I get the following warning:

2018-03-23 10:16:06.007 7f50e7299740 WARN blockchain.db.lmdb src/blockchain_db/lmdb/db_lmdb.cpp:72 Error attempting to retrieve a hard fork version at height 0 from the db: MDB_NOTFOUND: No matching key/data
pair found
2018-03-23 10:16:06.007 7f50e7299740 INFO stacktrace src/common/stack_trace.cpp:120 Exception: cryptonote::DB_ERROR
2018-03-23 10:16:06.007 7f50e7299740 INFO stacktrace src/common/stack_trace.cpp:121 Unwound call stack:
2018-03-23 10:16:06.012 7f50e7299740 INFO stacktrace src/common/stack_trace.cpp:159 [1] ./electroneumd:__cxa_throw+0x106 [0x7ce136]
2018-03-23 10:16:06.012 7f50e7299740 INFO stacktrace src/common/stack_trace.cpp:159 [2] ./electroneumd() [0x702f44]
2018-03-23 10:16:06.012 7f50e7299740 INFO stacktrace src/common/stack_trace.cpp:159 [3] ./electroneumd:cryptonote::BlockchainLMDB::get_hard_fork_version(unsigned long) const+0x3e9 [0x725689]
2018-03-23 10:16:06.012 7f50e7299740 INFO stacktrace src/common/stack_trace.cpp:159 [4] ./electroneumd:cryptonote::HardFork::init()+0x134 [0x81c364]
2018-03-23 10:16:06.012 7f50e7299740 INFO stacktrace src/common/stack_trace.cpp:159 [5] ./electroneumd:cryptonote::Blockchain::init(cryptonote::BlockchainDB*, bool, cryptonote::test_options const*)+0x1e7
[0x756707]
2018-03-23 10:16:06.012 7f50e7299740 INFO stacktrace src/common/stack_trace.cpp:159 [6] ./electroneumd:cryptonote::core::init(boost::program_options::variables_map const&, cryptonote::test_options const*)
+0xcc2 [0x770392]
2018-03-23 10:16:06.012 7f50e7299740 INFO stacktrace src/common/stack_trace.cpp:159 [7] ./electroneumd:daemonize::t_daemon::run(bool)+0x1e0 [0x5728e0]
2018-03-23 10:16:06.012 7f50e7299740 INFO stacktrace src/common/stack_trace.cpp:159 [8] ./electroneumd:daemonize::t_executor::run_interactive(boost::program_options::variables_map const&)+0x2a [0x67837a]
2018-03-23 10:16:06.012 7f50e7299740 INFO stacktrace src/common/stack_trace.cpp:159 [9] ./electroneumd:bool daemonizer::daemonizedaemonize::t_executor(int, char const**, daemonize::t_executor&&, boost::
program_options::variables_map const&)+0x17c [0x67a83c]
2018-03-23 10:16:06.012 7f50e7299740 INFO stacktrace src/common/stack_trace.cpp:159 [10] ./electroneumd:main+0x14b4 [0x547374]
2018-03-23 10:16:06.012 7f50e7299740 INFO stacktrace src/common/stack_trace.cpp:159 [11] /lib/x86_64-linux-gnu/libc.so.6:__libc_start_main+0xf0 [0x7f50e45ba830]
2018-03-23 10:16:06.012 7f50e7299740 INFO stacktrace src/common/stack_trace.cpp:159 [12] ./electroneumd:_start+0x29 [0x54e5d9]
2018-03-23 10:16:06.012 7f50e7299740 INFO stacktrace src/common/stack_trace.cpp:159

How can I overcome this?
Thanks in advance