Hi Alladi,

What version of PRPC are you using ? I just looked at the Activity on a PRPC719 system:

Rule-Connect-REST.pyInvokeRESTConnector (Pega-IntegrationEngine:07-10-19)

And I did 'Actions|View Java' : and I can see there is support for Proxy Server settings:

//BUG-140473 : Support for proxy
                    String proxyHost = System.getProperty("http.proxyHost");
                    if (proxyHost != null && proxyHost.length() > 0) {
                        String proxyPort = System.getProperty("http.proxyPort");
                        int proxyPortInt = Integer.parseInt(proxyPort);

                        // Instantiate new HttpHost for proxy config
                        com.pega.apache.http.HttpHost proxy = new com.pega.apache.http.HttpHost(
                                proxyHost, proxyPortInt);

                        String proxyUser = System.getProperty("http.proxyUser");
                        if (proxyUser != null && proxyUser.length() > 0) {
                            String proxyPwd = System
                                    .getProperty("http.proxyPassword");
                            // Set up Basic auth as Scheme for Proxy
                            List<String> authpref = new ArrayList<String>();
                            authpref
                                    .add(com.pega.apache.http.client.params.AuthPolicy.BASIC);
                            client
                                    .getParams()
                                    .setParameter(
                                            com.pega.apache.http.auth.params.AuthPNames.PROXY_AUTH_PREF,
                                            authpref);

                            // Configure proxy Authentication details
                            com.pega.apache.http.client.CredentialsProvider credsProvider = client
                                    .getCredentialsProvider();
                            credsProvider
                                    .setCredentials(
                                            new com.pega.apache.http.auth.AuthScope(
                                                    proxyHost, proxyPortInt),
                                            new com.pega.apache.http.auth.UsernamePasswordCredentials(
                                                    proxyUser, proxyPwd));
                            client.setCredentialsProvider(credsProvider);[...]

The BUG referenced at the top of the code ( BUG-140473) states that the change was made in PRPC715 (onwards) .

If you are a version < 715 , then the cleanest way to get the fix is to install 719 I would say.....

EDIT: I can see you are on version 719 already....

Can you do a 'view java' on your Activity and locate the Proxy Handling calls ?

You might want to add in some 'oLog.infoForced' onto a PRIVATE EDIT version of your Activity in Step 4 (where the Proxy support is mostly done).... and see whether it is being called or not....

Cheers

John