We are using IBM DB2 databases for our application and we use IBM Dataserver runtime client 11.5.7 in our application server to connect to DB2 server. We have SQLJ files to be compiled using the DB2 runtime client. With version 10 we were able to compile SQLJ files using sqlj.zip and other depencies. After updating the runtime client to 11.5..7 e are unable to compile SQLJ files. When we run sqlj and db2sqljcustomize command following error occurs :
'db2sqljcustomize' is not recognized as an internal or external command
'db2sqljcustomize' is not recognized as an internal or external command

As mentioned in (https://www.ibm.com/docs/en/db2/11.1?topic=apis-installing-data-server-driver-jdbc-sqlj),I installed IBM Data Server Driver for JDBC and SQLJ client  and got sqlj4.zip . But still I am unable to compile SQLJ files..Need help to resolve this compilation issues

C:\>which db2sqljcustomize
/c/SQLLIB/BIN/db2sqljcustomize

So make sure the PATH env variable points to the SQLLIB/BIN folder 

As an alternate to the windows command you can use below class as well.

SQLJ command
java sqlj.tools.Sqlj samplesqlj.sqlj

db2sqljcustomize command
java com.ibm.db2.jcc.sqlj.Customizer -url jdbc:db2://host:port/database -user username -password password samplesqlj_SJProfile0.ser

After migrating to 11.5.* replace the CLASSPATH with the sqlj4.zip for SQLJ and db2jcc4.jar for JCC driver.

@Kollol Misra

Thanks for your response. I have added the paths of SQLLIB/BIN , sqlj4.zip, db2jcc4.jar in CLASSPATH and PATH. When I run the java command you shared i get following error :

java sqlj.tools.Sqlj SampleSQLJ.sqlj
Error: Could not find or load main class sqlj.tools.Sqlj 

Also can you please let me know if you have db2sqljcustomize file inside SQLLIB/BIN path ? I have the sqlj4.zip in SQLLIB/java , should we need any other files for SQLJ compilation ?

@Phill Baker

I dont have any dll or exe file for ./db2sqljcustomize. I have installed IBM DB2 Runtime Client 11.5 (RTCCL) and I checked the SQLLIB/BIN path and couldn't find. Can you please let me know if we need any files for run db2sqljcustomize and  sqlj command ?
I get error for both sqlj command and db2sqljcustomize command 
'sqlj' is not recognized as an internal or external command
'db2sqljcustomize' is not recognized as an internal or external command

Please let me know what are the dependency files to run the sqlj and db2sqljcustomize command successfully. Do we have any other ibm  software available to get dependency  for sqlj compilation. Also let me know the path in which you usually have db2sqljcustomize.

Hi Phil,
Thank you for sharing software download link...I will install this and will try to compile my sqlj files.