diff --git a/unit_tests/logicdata.cpp b/unit_tests/logicdata.cpp
new file mode 100644
index 0000000000..0a21019f60
--- /dev/null
+++ b/unit_tests/logicdata.cpp
@@ -0,0 +1,19 @@
+/*
+ * @file logicdata.cpp
+ *
+ *  Created on: Jul 19, 2020
+ * @author Andrey Belomutskiy, (c) 2012-2020
+ */
+
+#include "logicdata.h"
+#include <stdio.h>
+#include <stdlib.h>
+
+void writeFile() {
+
+	FILE *ptr = fopen("test.logicdata", "wb");
+
+
+	fclose(ptr);
+
+}
diff --git a/unit_tests/logicdata_sandbox.cpp b/unit_tests/logicdata_sandbox.cpp
new file mode 100644
index 0000000000..fab07e3836
--- /dev/null
+++ b/unit_tests/logicdata_sandbox.cpp
@@ -0,0 +1,11 @@
+
+#include <cstdio>
+#include "logicdata.h"
+
+int main(int argc, char **argv) {
+	printf(".logicdata Sandbox 20200719\n");
+
+	writeFile();
+
+	printf("Done!\n");
+}
diff --git a/unit_tests/run_logicdata_sandbox.bat b/unit_tests/run_logicdata_sandbox.bat
new file mode 100644
index 0000000000..953f0e968f
--- /dev/null
+++ b/unit_tests/run_logicdata_sandbox.bat
@@ -0,0 +1,5 @@
+rm -f build/logicdata_sandbox.exe
+
+x86_64-w64-mingw32-g++ logicdata.cpp logicdata_sandbox.cpp -o build/logicdata_sandbox.exe -Wall
+
+build\logicdata_sandbox.exe