diff --git a/cur/SQLExecDirect.c b/cur/SQLExecDirect.c
index 670694f..2055636 100644
--- a/cur/SQLExecDirect.c
+++ b/cur/SQLExecDirect.c
@@ -207,15 +207,23 @@ SQLRETURN get_column_names( CLHSTMT cl_statement )
 
     cl_statement -> column_names = malloc( sizeof(char *) 
             * cl_statement -> column_count );
+    if ( !cl_statement->column_names )
+        return SQL_ERROR;
 
     cl_statement -> data_type = malloc( sizeof( SQLSMALLINT ) 
             * cl_statement -> column_count );
+    if ( !cl_statement->data_type )
+        return SQL_ERROR;
 
     cl_statement -> column_size = malloc( sizeof( SQLULEN ) 
             * cl_statement -> column_count );
+    if ( !cl_statement->column_size )
+        return SQL_ERROR;
 
     cl_statement -> decimal_digits = malloc( sizeof( SQLSMALLINT ) 
             * cl_statement -> column_count );
+    if ( !cl_statement->decimal_digits )
+        return SQL_ERROR;
 
     for ( i = 1; i <= cl_statement -> column_count; i ++ )
     {
diff --git a/ini/iniObjectInsert.c b/ini/iniObjectInsert.c
index d5d2916..0ffe1b4 100644
--- a/ini/iniObjectInsert.c
+++ b/ini/iniObjectInsert.c
@@ -30,6 +30,8 @@ int iniObjectInsert( HINI hIni, char *pszObject )
 
 	/* CREATE OBJECT STRUCT */
 	hObject = malloc( sizeof(INIOBJECT) );
+        if ( !hObject )
+            return INI_ERROR;
 	hIni->hCurProperty			= NULL;
 	hObject->hFirstProperty		= NULL;
 	hObject->hLastProperty		= NULL;
diff --git a/ini/iniOpen.c b/ini/iniOpen.c
index 20991fe..d4eae67 100644
--- a/ini/iniOpen.c
+++ b/ini/iniOpen.c
@@ -184,6 +184,8 @@ int iniOpen( HINI *hIni, char *pszFileName, char *cComment, char cLeftBracket, c
 
     /* INIT STATEMENT */
     *hIni = malloc( sizeof(INI) );
+    if ( !*hIni )
+        return INI_ERROR;
     if ( pszFileName && pszFileName != STDINFILE )
         strncpy((*hIni)->szFileName, pszFileName, ODBC_FILENAME_MAX );
     else if ( pszFileName == STDINFILE )
@@ -363,6 +365,8 @@ int iniOpen( HINI *hIni, char *pszFileName, char *cComment, char cLeftBracket, c
 
     /* INIT STATEMENT */
     *hIni = malloc( sizeof(INI) );
+    if ( !*hIni )
+        return INI_ERROR;
     if ( pszFileName && pszFileName != STDINFILE )
         strncpy((*hIni)->szFileName, pszFileName, ODBC_FILENAME_MAX );
     else if ( pszFileName == STDINFILE )
diff --git a/log/logOpen.c b/log/logOpen.c
index 5579f3c..b539455 100644
--- a/log/logOpen.c
+++ b/log/logOpen.c
@@ -41,6 +41,8 @@ int logOpen( HLOG *phLog, char *pszProgramName, char *pszLogFile, long nMaxMsgs
 
 	/* LOG STRUCT */
 	*phLog = malloc( sizeof(LOG) );
+        if ( !*phLog )
+            return LOG_ERROR;
     (*phLog)->nMaxMsgs			= nMaxMsgs;
     (*phLog)->hMessages			= lstOpen();
     (*phLog)->bOn				= 0;