diff --git a/slsDetectorSoftware/CMakeLists.txt b/slsDetectorSoftware/CMakeLists.txt
index b09cc757f..9e7136a8d 100755
--- a/slsDetectorSoftware/CMakeLists.txt
+++ b/slsDetectorSoftware/CMakeLists.txt
@@ -1,5 +1,6 @@
 set(SOURCES
     src/multiSlsDetector.cpp 
+    src/multiSlsDetectorClient.cpp
     src/slsDetectorUsers.cpp 
     src/slsDetectorCommand.cpp
     src/slsDetector.cpp 
diff --git a/slsDetectorSoftware/include/multiSlsDetectorClient.h b/slsDetectorSoftware/include/multiSlsDetectorClient.h
index e72e61332..55d1939d8 100755
--- a/slsDetectorSoftware/include/multiSlsDetectorClient.h
+++ b/slsDetectorSoftware/include/multiSlsDetectorClient.h
@@ -1,46 +1,17 @@
 #pragma once
 #include <iostream>
-#include <string>
-
 #include "CmdLineParser.h"
-#include "CmdProxy.h"
-#include "Detector.h"
-#include "container_utils.h"
-#include "multiSlsDetector.h"
-#include "slsDetectorCommand.h"
-#include "sls_detector_exceptions.h"
-#include "string_utils.h"
 
-#include <cstdlib>
-#include <memory>
-
-using sls::RuntimeError;
-
-inline int dummyCallback(detectorData *d, int p, void *) {
-    std::cout << "got data " << p << std::endl;
-    return 0;
-};
+class multiSlsDetector;
 
 class multiSlsDetectorClient {
   public:
     multiSlsDetectorClient(int argc, char *argv[], int action,
                            multiSlsDetector *myDetector = nullptr,
-                           std::ostream &output = std::cout)
-        : action_(action), detPtr(myDetector), os(output) {
-        parser.Parse(argc, argv);
-        if (parser.isHelp())
-            action_ = slsDetectorDefs::HELP_ACTION;
-        runCommand();
-    }
+                           std::ostream &output = std::cout);
     multiSlsDetectorClient(const std::string &args, int action,
                            multiSlsDetector *myDetector = nullptr,
-                           std::ostream &output = std::cout)
-        : action_(action), detPtr(myDetector), os(output) {
-        parser.Parse(args);
-        if (parser.isHelp())
-            action_ = slsDetectorDefs::HELP_ACTION;
-        runCommand();
-    }
+                           std::ostream &output = std::cout);
 
   private:
     int action_;
@@ -48,97 +19,5 @@ class multiSlsDetectorClient {
     multiSlsDetector *detPtr = nullptr;
     std::ostream &os;
 
-    void runCommand() {
-        bool verify = true;
-        bool update = true;
-        if (action_ == slsDetectorDefs::PUT_ACTION &&
-            parser.n_arguments() == 0) {
-            os << "Wrong usage - should be: " << parser.executable()
-               << "[id-][pos:]channel arg" << std::endl;
-            os << std::endl;
-            return;
-        };
-        if (action_ == slsDetectorDefs::GET_ACTION &&
-            parser.command().empty()) {
-            os << "Wrong usage - should be: " << parser.executable()
-               << "[id-][pos:]channel arg" << std::endl;
-            os << std::endl;
-            return;
-        };
-
-        if (action_ == slsDetectorDefs::READOUT_ACTION &&
-            parser.detector_id() != -1) {
-            os << "detector_id: " << parser.detector_id()
-               << " ,readout of individual detectors is not allowed!"
-               << std::endl;
-            return;
-        }
-
-        // special commands
-        if (parser.command() == "free") {
-            multiSlsDetector::freeSharedMemory(parser.multi_id(),
-                                               parser.detector_id());
-            return;
-        } // get user details without verify sharedMultiSlsDetector version
-        else if ((parser.command() == "user") &&
-                 (action_ == slsDetectorDefs::GET_ACTION)) {
-            verify = false;
-            update = false;
-        }
-
-        // create multiSlsDetector class if required
-        std::unique_ptr<multiSlsDetector> localDet;
-        if (detPtr == nullptr) {
-            try {
-                localDet = sls::make_unique<multiSlsDetector>(parser.multi_id(),
-                                                              verify, update);
-                detPtr = localDet.get();
-            } catch (const RuntimeError &e) {
-                /*os << e.GetMessage() << std::endl;*/
-                return;
-            } catch (...) {
-                os << " caught exception\n";
-                return;
-            }
-        }
-        if (parser.detector_id() >= static_cast<int>(detPtr->size())) {
-            os << "position is out of bounds.\n";
-            return;
-        }
-
-        // Call CmdProxy which execute the command if it exists, on success
-        // returns an empty string If the command is not in CmdProxy but
-        // deprecated the new command is returned
-        if (action_ != slsDetectorDefs::READOUT_ACTION) {
-            int multi_id = 0;
-            if (detPtr != nullptr)
-                multi_id = detPtr->getMultiId();
-            sls::Detector d(multi_id);
-            sls::CmdProxy<sls::Detector> proxy(&d);
-            // sls::CmdProxy<multiSlsDetector> proxy(detPtr);
-            auto cmd = proxy.Call(parser.command(), parser.arguments(),
-                                  parser.detector_id(), action_);
-            if (cmd.empty()) {
-                return;
-            } else {
-                parser.setCommand(cmd);
-            }
-        }
-
-        // call multi detector command line
-        slsDetectorCommand myCmd(detPtr);
-        std::string answer =
-            myCmd.executeLine(parser.n_arguments() + 1, parser.argv().data(),
-                              action_, parser.detector_id());
-
-        if (parser.multi_id() != 0)
-            os << parser.multi_id() << '-';
-        if (parser.detector_id() != -1)
-            os << parser.detector_id() << ':';
-
-        if (action_ != slsDetectorDefs::READOUT_ACTION) {
-            os << parser.command() << " ";
-        }
-        os << answer << std::endl;
-    }
+    void runCommand();
 };
diff --git a/slsDetectorSoftware/src/multiSlsDetectorClient.cpp b/slsDetectorSoftware/src/multiSlsDetectorClient.cpp
new file mode 100644
index 000000000..754dff440
--- /dev/null
+++ b/slsDetectorSoftware/src/multiSlsDetectorClient.cpp
@@ -0,0 +1,119 @@
+#include "multiSlsDetectorClient.h"
+#include "CmdProxy.h"
+#include "Detector.h"
+#include "multiSlsDetector.h"
+#include "slsDetectorCommand.h"
+#include "sls_detector_exceptions.h"
+
+#include <memory>
+
+multiSlsDetectorClient::multiSlsDetectorClient(int argc, char *argv[],
+                                               int action,
+                                               multiSlsDetector *myDetector,
+                                               std::ostream &output)
+    : action_(action), detPtr(myDetector), os(output) {
+    parser.Parse(argc, argv);
+    runCommand();
+}
+
+multiSlsDetectorClient::multiSlsDetectorClient(const std::string &args,
+                                               int action,
+                                               multiSlsDetector *myDetector,
+                                               std::ostream &output)
+    : action_(action), detPtr(myDetector), os(output) {
+    parser.Parse(args);
+    runCommand();
+}
+
+void multiSlsDetectorClient::runCommand() {
+    if (parser.isHelp())
+        action_ = slsDetectorDefs::HELP_ACTION;
+    bool verify = true;
+    bool update = true;
+    if (action_ == slsDetectorDefs::PUT_ACTION && parser.n_arguments() == 0) {
+        os << "Wrong usage - should be: " << parser.executable()
+           << "[id-][pos:]channel arg" << std::endl;
+        os << std::endl;
+        return;
+    };
+    if (action_ == slsDetectorDefs::GET_ACTION && parser.command().empty()) {
+        os << "Wrong usage - should be: " << parser.executable()
+           << "[id-][pos:]channel arg" << std::endl;
+        os << std::endl;
+        return;
+    };
+
+    if (action_ == slsDetectorDefs::READOUT_ACTION &&
+        parser.detector_id() != -1) {
+        os << "detector_id: " << parser.detector_id()
+           << " ,readout of individual detectors is not allowed!" << std::endl;
+        return;
+    }
+
+    // special commands
+    if (parser.command() == "free") {
+        multiSlsDetector::freeSharedMemory(parser.multi_id(),
+                                           parser.detector_id());
+        return;
+    } // get user details without verify sharedMultiSlsDetector version
+    else if ((parser.command() == "user") &&
+             (action_ == slsDetectorDefs::GET_ACTION)) {
+        verify = false;
+        update = false;
+    }
+
+    // create multiSlsDetector class if required
+    std::unique_ptr<multiSlsDetector> localDet;
+    if (detPtr == nullptr) {
+        try {
+            localDet = sls::make_unique<multiSlsDetector>(parser.multi_id(),
+                                                          verify, update);
+            detPtr = localDet.get();
+        } catch (const sls::RuntimeError &e) {
+            /*os << e.GetMessage() << std::endl;*/
+            return;
+        } catch (...) {
+            os << " caught exception\n";
+            return;
+        }
+    }
+    if (parser.detector_id() >= static_cast<int>(detPtr->size())) {
+        os << "position is out of bounds.\n";
+        return;
+    }
+
+    // Call CmdProxy which execute the command if it exists, on success
+    // returns an empty string If the command is not in CmdProxy but
+    // deprecated the new command is returned
+    if (action_ != slsDetectorDefs::READOUT_ACTION) {
+        int multi_id = 0;
+        if (detPtr != nullptr)
+            multi_id = detPtr->getMultiId();
+        sls::Detector d(multi_id);
+        sls::CmdProxy<sls::Detector> proxy(&d);
+        // sls::CmdProxy<multiSlsDetector> proxy(detPtr);
+        auto cmd = proxy.Call(parser.command(), parser.arguments(),
+                              parser.detector_id(), action_);
+        if (cmd.empty()) {
+            return;
+        } else {
+            parser.setCommand(cmd);
+        }
+    }
+
+    // call multi detector command line
+    slsDetectorCommand myCmd(detPtr);
+    std::string answer =
+        myCmd.executeLine(parser.n_arguments() + 1, parser.argv().data(),
+                          action_, parser.detector_id());
+
+    if (parser.multi_id() != 0)
+        os << parser.multi_id() << '-';
+    if (parser.detector_id() != -1)
+        os << parser.detector_id() << ':';
+
+    if (action_ != slsDetectorDefs::READOUT_ACTION) {
+        os << parser.command() << " ";
+    }
+    os << answer << std::endl;
+}
\ No newline at end of file
diff --git a/slsDetectorSoftware/src/sls_detector_client.cpp b/slsDetectorSoftware/src/sls_detector_client.cpp
index e140fa18d..264b98029 100755
--- a/slsDetectorSoftware/src/sls_detector_client.cpp
+++ b/slsDetectorSoftware/src/sls_detector_client.cpp
@@ -1,6 +1,8 @@
 #include "multiSlsDetectorClient.h"
+#include "sls_detector_defs.h"
 #include "versionAPI.h"
-#include <cstdlib>
+
+#include <cstring> //strcmp
 
 int main(int argc, char *argv[]) {
     for (int i = 1; i < argc; ++i) {