Agent installation failed

Agent installation is failed on Linux x86_64 platform during per-requisite check (transferring agent image from OMS to target host).

Newly installed OMS, when I restart OMS then agent installation is hung for a while and not proceeding further. If I try later then getting End-of-central-directory signature not found error though unzip directory has required permissions and /tmp is having 6G space available.

Error Message:[/eioemurtp1/oem12cR3/agent12c/ADATMP_2015-05-07_05-59-32-AM/12.1.0.3.0_AgentCore_226.zip] End-of-central-directory signature not found. Either this file is not a zipfile, or it constitutes one disk of a multi-part archive. In the latter case the central directory and zipfile comment will be found on the last disk(s) of this archive. note: /eioemurtp1/oem12cR3/agent12c/ADATMP_2015-05-07_05-59-32-AM/12.1.0.3.0_AgentCore_226.zip may be a plain executable, not an archive unzip: cannot find zipfile directory in one of /eioemurtp1/oem12cR3/agent12c/ADATMP_2015-05-07_05-59-32-AM/12.1.0.3.0_AgentCore_226.zip or /eioemurtp1/oem12cR3/agent12c/ADATMP_2015-05-07_05-59-32-AM/12.1.0.3.0_AgentCore_226.zip.zip, and cannot find /eioemurtp1/oem12cR3/agent12c/ADATMP_2015-05-07_05-59-32-AM/12.1.0.3.0_AgentCore_226.zip.ZIP, period.