In absence of accession number to limit the back blast, this error occur :
Error: Error in blastp: Error: NCBI C++ Exception: T0 "/home/coremake/release_build/build/PrepareRelease_Linux64-Centos_JSID_01_380670_130.14.18.6_9008__PrepareRelease_Linux64-Centos_1508370803/rpmbuild/BUILD/ncbi-blast-2.7.1+/c++/src/corelib/ncbifile.cpp", line 5613: Error: ncbi::CMemoryFileMap::CMemoryFileMap() - To be memory mapped the file must exist: