diff --git a/rcbasic_build/identifier.h b/rcbasic_build/identifier.h
index c23c0df..cf3c18a 100755
--- a/rcbasic_build/identifier.h
+++ b/rcbasic_build/identifier.h
@@ -352,6 +352,15 @@ bool memberExists(string member_name)
 bool add_type_member(string member_name, int member_type, string member_utype_name, int member_dim_count, string dim1 = "n0", string dim2 = "n0", string dim3 = "n0")
 {
     int m_utype_index = member_utype_name.compare("")!=0 ? getUType(member_utype_name) : -1;
+
+    //cout << "m_utype_index = " << m_utype_index << " : " << member_utype_name << endl;
+
+    if((member_utype_name.compare("")!=0) && m_utype_index < 0)
+	{
+		rc_setError(member_utype_name + " does not name a valid type");
+		return false;
+	}
+
     if(m_utype_index == current_type_index)
     {
         //cout << "you canno do is" << endl;
diff --git a/rcbasic_build/main.cpp b/rcbasic_build/main.cpp
index f9708b6..ca44fd2 100755
--- a/rcbasic_build/main.cpp
+++ b/rcbasic_build/main.cpp
@@ -920,7 +920,7 @@ int main(int argc, char * argv[])
 
     //DEBUG START
     //chdir("/home/n00b/Programs/RCBasic_v400_Linux64/examples/Spinning Axis");
-    //rc_filename = "/home/n00b/Programs/RCBasic_v400_Linux64/examples/Spinning Axis/main.bas";
+    rc_filename = "/home/n00b/test/stp/serenity_main.bas";
 	//rc_filename = "/home/n00b/Downloads/Tile Scrolling/main.bas";
 	//rc_filename = "/home/n00b/Programs/RCBasic_v400_Linux64/examples/Constraint/main.bas";
 	//rc_filename = "/home/n00b/Programs/RCBasic_v400_Linux64/examples/Simple 3D Platformer/main.bas";
diff --git a/rcbasic_build/parser.h b/rcbasic_build/parser.h
index eadb9d7..b981fbb 100755
--- a/rcbasic_build/parser.h
+++ b/rcbasic_build/parser.h
@@ -3404,9 +3404,10 @@ bool check_rule()
                     {
                         if(current_block_state == BLOCK_STATE_TYPE)
                         {
-                            //cout << "adding type member" << endl;
+                            //cout << "adding type member: " << id_name << ", " << id_type << endl;
                             if(!add_type_member(id_name, id_type, "", 0))
-                            {
+                            {
+                            	//std::cout << "error" << std::endl;
                                 //cout << rc_getError() << endl;
                                 return false;
                             }
diff --git a/rcbasic_build/rcbasic_build.depend b/rcbasic_build/rcbasic_build.depend
index ede4ae7..20b6890 100755
--- a/rcbasic_build/rcbasic_build.depend
+++ b/rcbasic_build/rcbasic_build.depend
@@ -1,5 +1,5 @@
 # depslib dependency file v1.0
-1735455479 source:/home/n00b/Projects/RCBASIC4/rcbasic_build/main.cpp
+1737898951 source:/home/n00b/Projects/RCBASIC4/rcbasic_build/main.cpp
 	<iostream>
 	<stack>
 	<vector>
@@ -14,7 +14,7 @@
 	"env_resolve.h"
 	"identifier.h"
 
-1735169600 /home/n00b/Projects/RCBASIC4/rcbasic_build/tokenizer.h
+1737864366 /home/n00b/Projects/RCBASIC4/rcbasic_build/tokenizer.h
 	<iostream>
 	<string>
 	<cctype>
@@ -37,14 +37,14 @@
 1734372057 /home/n00b/Projects/RCBASIC4/rcbasic_build/constants.h
 	<vector>
 
-1734900354 /home/n00b/Projects/RCBASIC4/rcbasic_build/parser.h
+1737900196 /home/n00b/Projects/RCBASIC4/rcbasic_build/parser.h
 	"tokenizer.h"
 	"identifier.h"
 	"rc_global.h"
 	"constants.h"
 	<inttypes.h>
 
-1734372966 /home/n00b/Projects/RCBASIC4/rcbasic_build/identifier.h
+1737900569 /home/n00b/Projects/RCBASIC4/rcbasic_build/identifier.h
 	<inttypes.h>
 	<stack>
 	"rc_global.h"
@@ -54,7 +54,7 @@
 1734372057 /home/n00b/Projects/RCBASIC4/rcbasic_build/rc_global.h
 	<inttypes.h>
 
-1734919451 /home/n00b/Projects/RCBASIC4/rcbasic_build/rc_builtin.h
+1737863743 /home/n00b/Projects/RCBASIC4/rcbasic_build/rc_builtin.h
 	"identifier.h"
 
 1734372057 /home/n00b/Projects/RCBASIC4/rcbasic_build/rc_vm_asm.h