db_lmdb.hpp:15] Check failed: mdb_status == 0 (2 vs. 0) No such file or directory

I have been trying to run the squeeznet model for quite some time now,after resolving multiple errors,i am stuck with this one-

when i run the command

./build/tools/caffe train -solve SqueezeNet/SqueezeNet_v1.0/solver.prototxt

i get

I0723 16:26:58.532799 11108 layer_factory.hpp:77] Creating layer data
F0723 16:26:58.629655 11108 db_lmdb.hpp:15] Check failed: mdb_status 
== 0 (2 vs. 0) No such file or directory
***     Check failure stack trace: ***
    @     0x7fb24de835cd  google::LogMessage::Fail()
    @     0x7fb24de85433  google::LogMessage::SendToLog()
    @     0x7fb24de8315b  google::LogMessage::Flush()
    @     0x7fb24de85e1e  google::LogMessageFatal::~LogMessageFatal()
    @     0x7fb24e23efd8  caffe::db::LMDB::Open()
    @     0x7fb24e2b541f  caffe::DataLayer<>::DataLayer()
    @     0x7fb24e2b55b2  caffe::Creator_DataLayer<>()
    @     0x7fb24e290a59  caffe::Net<>::Init()
    @     0x7fb24e29343e  caffe::Net<>::Net()
    @     0x7fb24e22a315  caffe::Solver<>::InitTrainNet()
    @     0x7fb24e22b6f5  caffe::Solver<>::Init()
    @     0x7fb24e22ba0f  caffe::Solver<>::Solver()
    @     0x7fb24e21c851  caffe::Creator_SGDSolver<>()
    @           0x40a958  train()
    @           0x4072f8  main
    @     0x7fb24c50c830  __libc_start_main
    @           0x407bc9  _start
    @              (nil)  (unknown)
Aborted (core dumped)

Any suggestions?