1982097 - System call failed. Error 13 (Permission denied) in execution of system call 'openU' with parameter for JDBCCONNECT.JAR

You are performing the installation of a NetWeaver based system using the Software Provisioning Manager (SWPM), when you get following errors (sapinst_dev.log):

System call failed. Error 13 (Permission denied) in execution of system call 'openU' with parameter 
(/test/download/SWPM10/COMMON/INSTALL/JDBCCONNECT.JAR, O_RDONLY), line (291) in file (syuxcfile.cpp), stack trace: 
EJSController.cpp: 181: EJSControllerImpl::executeScript()
JSExtension.hpp: 1058: CallFunctionBase::call()
iaxxbfile.cpp: 493: CIaOsFile::copyFromPath_impl()
syuxcfile.cpp: 255: CSyFileImpl::copy(const CSyPath & /usr/sap/<SID>/SYS/exe/run/jdbcconnect.jar, 
ISyNode::CopyMoveMode_t 0x3, ISyProgressObserver*) const

OR

ERROR 2018-01-30 13:38:02.633 [CSiStepExecute.cpp:1158]
FCO-00011 The step copyScripts with step key |NW_ABAP_OneHost|ind|ind|ind|ind|0|0|NW_Onehost_System|ind|ind|ind|ind|onehost|0|NW_Unpack2|ind|ind|ind|ind|unpack|0|copyScripts was executed with status ERROR 
( Last error reported by the step: System call failed. Error 13 (The file access permissions do not allow the specified action.) in execution of system call 'openU' with parameter (/install/sap<SID>/SWPM/COMMON/INSTALL/DB6/STARTDB, O_RDONLY), 
line (291) in file (syuxcfile.cpp), stack trace: EJSController.cpp: 183: EJSControllerImpl::executeScript()