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Fatal NI connect error 12560, connecting to:

(DESCRIPTION=(ADDRESS=(PROTOCOL=BEQ)(PROGRAM=oracle)(ARGV0=oracleORCL)(ARGS='(DESCRIPTION=(LOCAL=YES)(ADDRESS=(PROTOCOL=beq)))'))(CONNECT_DATA=(SID=ORCL)(CID=(PROGRAM=Y:\ORACLEDS10GR2\bin\sqlplus.exe)(HOST=10-7723)(USER=proldan))))

VERSION INFORMATION:

TNS for 32-bit Windows: Version 10.1.0.5.0 - Production

Oracle Bequeath NT Protocol Adapter for 32-bit Windows: Version 10.1.0.5.0 - Production

Windows NT TCP/IP NT Protocol Adapter for 32-bit Windows: Version 10.1.0.5.0 - Production

Time: 09-DEC-2016 12:19:21

Tracing not turned on.

Tns error struct:

ns main err code: 12560

TNS-12560: TNS:protocol adapter error

ns secondary err code: 0

nt main err code: 530

TNS-00530: Protocol adapter error

nt secondary err code: 126

nt OS err code: 0