diff --git a/src/libslic3r/Config.cpp b/src/libslic3r/Config.cpp
index 46cbd9891c..1fe4816ad3 100644
--- a/src/libslic3r/Config.cpp
+++ b/src/libslic3r/Config.cpp
@@ -728,39 +728,6 @@ ConfigSubstitutions ConfigBase::load(const boost::property_tree::ptree &tree, Fo
     return std::move(substitutions_ctxt.substitutions);
 }
 
-// Load the config keys from the tail of a G-code file.
-ConfigSubstitutions ConfigBase::load_from_gcode_file(const std::string &file, ForwardCompatibilitySubstitutionRule compatibility_rule)
-{
-    try {
-        // Read a 64k block from the end of the G-code.
-    	boost::nowide::ifstream ifs(file);
-    	{
-    		const char slic3r_gcode_header[] = "; generated by Slic3r ";
-            const char prusaslicer_gcode_header[] = "; generated by PrusaSlicer ";
-    		std::string firstline;
-    		std::getline(ifs, firstline);
-    		if (strncmp(slic3r_gcode_header, firstline.c_str(), strlen(slic3r_gcode_header)) != 0 &&
-                strncmp(prusaslicer_gcode_header, firstline.c_str(), strlen(prusaslicer_gcode_header)) != 0)
-    			throw ConfigurationError("Not a PrusaSlicer / Slic3r PE generated g-code.");
-    	}
-        ifs.seekg(0, ifs.end);
-    	auto file_length = ifs.tellg();
-    	auto data_length = std::min<std::fstream::pos_type>(65535, file_length);
-    	ifs.seekg(file_length - data_length, ifs.beg);
-        std::vector<char> data(size_t(data_length) + 1, 0);
-        ifs.read(data.data(), data_length);
-        ifs.close();
-
-        ConfigSubstitutionContext substitutions_ctxt(compatibility_rule);
-        size_t key_value_pairs = load_from_gcode_string(data.data(), substitutions_ctxt);
-        if (key_value_pairs < 80)
-            throw ConfigurationError(format("Suspiciously low number of configuration values extracted from %1%: %2%", file, key_value_pairs));
-        return std::move(substitutions_ctxt.substitutions);
-    } catch (const ConfigurationError &e) {
-        throw ConfigurationError(format("Failed loading configuration from G-code \"%1%\": %2%", file, e.what()));
-    }        
-}
-
 // Load the config keys from the given string.
 static inline size_t load_from_gcode_string_legacy(ConfigBase &config, const char *str, ConfigSubstitutionContext &substitutions)
 {
diff --git a/src/slic3r/GUI/Jobs/SLAImportJob.cpp b/src/slic3r/GUI/Jobs/SLAImportJob.cpp
index 45b432b5c7..027bf68492 100644
--- a/src/slic3r/GUI/Jobs/SLAImportJob.cpp
+++ b/src/slic3r/GUI/Jobs/SLAImportJob.cpp
@@ -119,6 +119,7 @@ public:
     wxString             path;
     Vec2i                win = {2, 2};
     std::string          err;
+    ConfigSubstitutions config_substitutions;
 
     priv(Plater *plt) : plater{plt} {}
 };
diff --git a/src/slic3r/GUI/MsgDialog.hpp b/src/slic3r/GUI/MsgDialog.hpp
index ac4fa44e6f..77617fea1b 100644
--- a/src/slic3r/GUI/MsgDialog.hpp
+++ b/src/slic3r/GUI/MsgDialog.hpp
@@ -114,6 +114,22 @@ public:
 #endif
 
 
+// Generic info dialog, used for displaying exceptions
+class InfoDialog : public MsgDialog
+{
+public:
+	InfoDialog(wxWindow *parent, const wxString &title, const wxString &msg);
+	InfoDialog(InfoDialog&&) = delete;
+	InfoDialog(const InfoDialog&) = delete;
+	InfoDialog&operator=(InfoDialog&&) = delete;
+	InfoDialog&operator=(const InfoDialog&) = delete;
+	virtual ~InfoDialog() = default;
+
+private:
+	wxString msg;
+};
+
+
 }
 }