diff --git a/main.cpp b/main.cpp
index c799659d..fe580593 100644
--- a/main.cpp
+++ b/main.cpp
@@ -41,10 +41,16 @@ public:
 	}
 };
 int main() {
-	A a;
+	/*A a;
 	CONNECTU(PICout::Notifier::object(), finished, &a, pcf);
 	PIString buffer = "my buff:";
-	PICout(&buffer, 1) << "int 10 ->" << 10 << ", time ->" << PITime::current();
+	PICout(&buffer, 1) << "int 10 ->" << 10 << ", time ->" << PITime::current();*/
+	PIString s("str");
+	piCout << s;
+	piCout << s.quoted();
+	piCout << s.quoted();
+	piCout << s.quote();
+	piCout << s;
 	return 0;
 /*}
 
diff --git a/src_main/core/pistring.h b/src_main/core/pistring.h
index b1762327..cd868130 100755
--- a/src_main/core/pistring.h
+++ b/src_main/core/pistring.h
@@ -343,6 +343,14 @@ public:
 	 * \details Example: \snippet pistring.cpp PIString::expandLeftTo
 	 * \sa \a expandRightTo() */
 	PIString & expandLeftTo(const int len, const PIChar & c) {if (len > length()) insert(0, PIString(len - length(), c)); return *this;}
+
+	/*! \brief Add " symbols at the beginning and end of the string, and return this string
+	 * \sa \a quoted() */
+	PIString & quote() {insert(0, PIChar('"')); *this += PIChar('"'); return *this;}
+
+	/*! \brief Return quoted copy of this string
+	 * \sa \a quote() */
+	PIString   quoted() {return PIString(*this).quote();}
 	
 	/*! \brief Reverse string and return this string
 	 * \details Example: \snippet pistring.cpp PIString::reverse 
diff --git a/src_main/piversion.h b/src_main/piversion.h
index 97951638..36c3f128 100644
--- a/src_main/piversion.h
+++ b/src_main/piversion.h
@@ -4,7 +4,7 @@
 
 #define PIP_VERSION_MAJOR      1
 #define PIP_VERSION_MINOR      7
-#define PIP_VERSION_REVISION   1
+#define PIP_VERSION_REVISION   2
 #define PIP_VERSION_SUFFIX     ""
 
 #endif // PIVERSION_H
diff --git a/src_main/system/pisystemmonitor.cpp b/src_main/system/pisystemmonitor.cpp
index a2e12e71..8a1201ca 100755
--- a/src_main/system/pisystemmonitor.cpp
+++ b/src_main/system/pisystemmonitor.cpp
@@ -326,7 +326,7 @@ void PISystemMonitor::gatherThread(llong id) {
 	ts.id = id;
 	ts.name = tbid.value(id, "<non-PIThread>");
 #ifndef WINDOWS
-	PIFile f(PRIVATE->proc_dir + "task/" + PIString(id) + "/stat");
+	PIFile f(PRIVATE->proc_dir + "task/" + PIString::fromNumber(id) + "/stat");
 	//piCout << f.path();
 	if (!f.open(PIIODevice::ReadOnly))
 		return;