There is no JDK/JRE installed under the "<RDBMS ORACLE_HOME>/appsutil/jre/bin" directory.
$ ./java -version
java version "1.6.0_07"
Java(TM) SE Runtime Environment (build 1.6.0_07-b06)
Java HotSpot(TM) Server VM (build 10.0-b23, mixed mode)
If the version information is returned, the JDK/JRE is working. This "java" executable file should be referenced directly in the Context File, as noted in
2. Check the value of "s_adjvaprg" in the Context File:
$ grep s_adjvaprg *.xml (assumes there is only 1 ".xml" file)
<ADJVAPRG oa_var="s_adjvaprg" osd="UNIX">/d01/R1211/db/tech_st/11.1.0/appsutil/jre/bin/java</ADJVAPRG>
Note that the value of "s_adjvaprg" points to the full path to the java executable and includes the name of the executable, "java", as well.
3. If there is no "java" under "<RDBMS ORACLE_HOME>/appsutil/jre/bin", you will need to replace the "jre" directory and all sub-directories with a full JDK/JRE installation. Generally, you can find this under "$ORACLE_HOME/jdk"
4. If any changes have been made, now re-try the "adcfgclone.pl" command.