diff --git a/runtime/syntax/plsql.vim b/runtime/syntax/plsql.vim
index 21681d5..9b4df09 100644
--- a/runtime/syntax/plsql.vim
+++ b/runtime/syntax/plsql.vim
@@ -4,8 +4,11 @@
 " Previous Maintainer: Jeff Lanzarotta (jefflanzarotta at yahoo dot com)
 " Previous Maintainer: C. Laurence Gonsalves (clgonsal@kami.com)
 " URL: https://github.com/lee-lindley/vim_plsql_syntax
-" Last Change: Aug 21, 2022   
-" History  Lee Lindley (lee dot lindley at gmail dot com)
+" Last Change: Sep 19, 2022   
+" History  Carsten Czarski (carsten dot czarski at oracle com)
+"               add handling for typical SQL*Plus commands (rem, start, host, set, etc)
+"               add error highlight for non-breaking space
+"          Lee Lindley (lee dot lindley at gmail dot com)
 "               use get with default 0 instead of exists per Bram suggestion
 "               make procedure folding optional
 "               updated to 19c keywords. refined quoting. 
@@ -54,8 +57,13 @@
 
 syn match   plsqlGarbage "[^ \t()]"
 syn match   plsqlIdentifier "[a-z][a-z0-9$_#]*"
+syn match   plsqlSqlPlusDefine "&&\?[a-z][a-z0-9$_#]*\.\?"
 syn match   plsqlHostIdentifier ":[a-z][a-z0-9$_#]*"
 
+" The Non-Breaking is often accidentally typed (Mac User: Opt+Space, after typing the "|",  Opt+7);
+" error highlight for these avoids running into annoying compiler errors.
+syn match   plsqlIllegalSpace "[\xa0]"
+
 " When wanted, highlight the trailing whitespace.
 if get(g:,"plsql_space_errors",0) == 1
   if get(g:,"plsql_no_trail_space_error",0) == 0
@@ -79,7 +87,6 @@
 "
 " conditional compilation Preprocessor directives and sqlplus define sigil
 syn match plsqlPseudo "$[$a-z][a-z0-9$_#]*"
-syn match plsqlPseudo "&"
 
 syn match plsqlReserved "\<\(CREATE\|THEN\|UPDATE\|INSERT\|SET\)\>"
 syn match plsqlKeyword "\<\(REPLACE\|PACKAGE\|FUNCTION\|PROCEDURE\|TYPE|BODY\|WHEN\|MATCHED\)\>"
@@ -150,7 +157,7 @@
 syn keyword plsqlKeyword DBMS_STATS DBSTR2UTF8 DBTIMEZONE DB_ROLE_CHANGE DB_UNIQUE_NAME DB_VERSION
 syn keyword plsqlKeyword DDL DEALLOCATE DEBUG DEBUGGER DECLARE DECODE DECOMPOSE DECOMPRESS DECORRELATE
 syn keyword plsqlKeyword DECR DECREMENT DECRYPT DEDUPLICATE DEFAULTS DEFAULT_COLLATION DEFAULT_PDB_HINT
-syn keyword plsqlKeyword DEFERRABLE DEFERRED DEFINE DEFINED DEFINER DEFINITION DEGREE DELAY DELEGATE
+syn keyword plsqlKeyword DEFERRABLE DEFERRED DEFINED DEFINER DEFINITION DEGREE DELAY DELEGATE
 syn keyword plsqlKeyword DELETEXML DELETE_ALL DEMAND DENORM_AV DENSE_RANK DENSE_RANKM DEPENDENT DEPTH
 syn keyword plsqlKeyword DEQUEUE DEREF DEREF_NO_REWRITE DESCENDANT DESCRIPTION DESTROY DETACHED DETERMINED
 syn keyword plsqlKeyword DETERMINES DETERMINISTIC DG_GATHER_STATS DIAGNOSTICS DICTIONARY DIGEST DIMENSION
@@ -189,7 +196,7 @@
 syn keyword plsqlKeyword HIER_CAPTION HIER_CHILDREN HIER_CHILD_COUNT HIER_COLUMN HIER_CONDITION HIER_DEPTH
 syn keyword plsqlKeyword HIER_DESCRIPTION HIER_HAS_CHILDREN HIER_LAG HIER_LEAD HIER_LEVEL HIER_MEMBER_NAME
 syn keyword plsqlKeyword HIER_MEMBER_UNIQUE_NAME HIER_ORDER HIER_PARENT HIER_WINDOW HIGH HINTSET_BEGIN
-syn keyword plsqlKeyword HINTSET_END HOST HOT HOUR HOURS HTTP HWM_BROKERED HYBRID ID IDENTIFIER IDENTITY
+syn keyword plsqlKeyword HINTSET_END HOT HOUR HOURS HTTP HWM_BROKERED HYBRID ID IDENTIFIER IDENTITY
 syn keyword plsqlKeyword IDGENERATORS IDLE IDLE_TIME IGNORE IGNORE_OPTIM_EMBEDDED_HINTS IGNORE_ROW_ON_DUPKEY_INDEX
 syn keyword plsqlKeyword IGNORE_WHERE_CLAUSE ILM IMMEDIATE IMMUTABLE IMPACT IMPORT INACTIVE INACTIVE_ACCOUNT_TIME
 syn keyword plsqlKeyword INCLUDE INCLUDES INCLUDE_VERSION INCLUDING INCOMING INCR INCREMENT INCREMENTAL
@@ -342,7 +349,7 @@
 syn keyword plsqlKeyword SERIAL SERIALIZABLE SERVERERROR SERVICE SERVICES SERVICE_NAME_CONVERT SESSION
 syn keyword plsqlKeyword SESSIONS_PER_USER SESSIONTIMEZONE SESSIONTZNAME SESSION_CACHED_CURSORS SETS
 syn keyword plsqlKeyword SETTINGS SET_GBY_PUSHDOWN SET_TO_JOIN SEVERE SHARD SHARDED SHARDS SHARDSPACE
-syn keyword plsqlKeyword SHARD_CHUNK_ID SHARED SHARED_POOL SHARE_OF SHARING SHD$COL$MAP SHELFLIFE SHOW
+syn keyword plsqlKeyword SHARD_CHUNK_ID SHARED SHARED_POOL SHARE_OF SHARING SHD$COL$MAP SHELFLIFE 
 syn keyword plsqlKeyword SHRINK SHUTDOWN SIBLING SIBLINGS SID SIGN SIGNAL_COMPONENT SIGNAL_FUNCTION
 syn keyword plsqlKeyword SIGNATURE SIMPLE SIN SINGLE SINGLETASK SINH SITE SKEWNESS_POP SKEWNESS_SAMP
 syn keyword plsqlKeyword SKIP SKIP_EXT_OPTIMIZER SKIP_PROXY SKIP_UNQ_UNUSABLE_IDX SKIP_UNUSABLE_INDEXES
@@ -445,7 +452,7 @@
 syn keyword plsqlKeyword VERIFIER VERIFY VERSION VERSIONING VERSIONS VERSIONS_ENDSCN VERSIONS_ENDTIME
 syn keyword plsqlKeyword VERSIONS_OPERATION VERSIONS_STARTSCN VERSIONS_STARTTIME VERSIONS_XID VIEWS
 syn keyword plsqlKeyword VIOLATION VIRTUAL VISIBILITY VISIBLE VOLUME VSIZE WAIT WALLET WEEK WEEKS WELLFORMED
-syn keyword plsqlKeyword WHENEVER WHITESPACE WIDTH_BUCKET WINDOW WITHIN WITHOUT WITH_EXPRESSION
+syn keyword plsqlKeyword WHITESPACE WIDTH_BUCKET WINDOW WITHIN WITHOUT WITH_EXPRESSION
 syn keyword plsqlKeyword WITH_PLSQL WORK WRAPPED WRAPPER WRITE XDB_FASTPATH_INSERT XID XML XML2OBJECT
 syn keyword plsqlKeyword XMLATTRIBUTES XMLCAST XMLCDATA XMLCOLATTVAL XMLCOMMENT XMLCONCAT XMLDIFF XMLELEMENT
 syn keyword plsqlKeyword XMLEXISTS XMLEXISTS2 XMLFOREST XMLINDEX_REWRITE XMLINDEX_REWRITE_IN_SELECT
@@ -468,13 +475,13 @@
 syn keyword plsqlReserved OCIDURATION OCIINTERVAL OCILOBLOCATOR OCINUMBER OCIRAW OCIREF OCIREFCURSOR
 syn keyword plsqlReserved OCIROWID OCISTRING OCITYPE OF ON OPTION ORACLE ORADATA ORDER ORLANY ORLVARY
 syn keyword plsqlReserved OUT OVERRIDING PARALLEL_ENABLE PARAMETER PASCAL PCTFREE PIPE PIPELINED POLYMORPHIC
-syn keyword plsqlReserved PRAGMA PRIOR PUBLIC RAISE RECORD RELIES_ON REM RENAME RESOURCE RESULT REVOKE ROWID 
+syn keyword plsqlReserved PRAGMA PRIOR PUBLIC RAISE RECORD RELIES_ON RENAME RESOURCE RESULT REVOKE ROWID 
 syn keyword plsqlReserved SB1 SB2 
 syn match plsqlReserved "\<SELECT\>"
 syn keyword plsqlReserved SEPARATE SHARE SHORT SIZE SIZE_T SPARSE SQLCODE SQLDATA
 syn keyword plsqlReserved SQLNAME SQLSTATE STANDARD START STORED STRUCT STYLE SYNONYM TABLE TDO
 syn keyword plsqlReserved TRANSACTIONAL TRIGGER UB1 UB4 UNION UNIQUE UNSIGNED UNTRUSTED VALIST
-syn keyword plsqlReserved VALUES VARIABLE VIEW VOID WHERE WITH
+syn keyword plsqlReserved VALUES VIEW VOID WHERE WITH
 
 " PL/SQL and SQL functions.
 syn keyword plsqlFunction ABS ACOS ADD_MONTHS APPROX_COUNT APPROX_COUNT_DISTINCT APPROX_COUNT_DISTINCT_AGG
@@ -584,18 +591,18 @@
 syn match plsqlISAS "\<\(IS\|AS\)\>"
 
 " Various types of comments.
-syntax region plsqlCommentL start="--" skip="\\$" end="$" keepend extend contains=@plsqlCommentGroup,plsqlSpaceError
+syntax region plsqlCommentL start="--" skip="\\$" end="$" keepend extend contains=@plsqlCommentGroup,plsqlSpaceError,plsqlIllegalSpace,plsqlSqlplusDefine
 if get(g:,"plsql_fold",0) == 1
     syntax region plsqlComment
         \ start="/\*" end="\*/"
         \ extend
-        \ contains=@plsqlCommentGroup,plsqlSpaceError
+        \ contains=@plsqlCommentGroup,plsqlSpaceError,plsqlIllegalSpace,plsqlSqlplusDefine
         \ fold
 else
     syntax region plsqlComment
         \ start="/\*" end="\*/"
         \ extend
-        \ contains=@plsqlCommentGroup,plsqlSpaceError
+        \ contains=@plsqlCommentGroup,plsqlSpaceError,plsqlIllegalSpace,plsqlSqlplusDefine
 endif
 syn cluster plsqlCommentAll contains=plsqlCommentL,plsqlComment
 
@@ -618,23 +625,23 @@
 " double quoted strings in SQL are database object names. Should be a subgroup of Normal.
 " We will use Character group as a proxy for that so color can be chosen close to Normal
 syn region plsqlQuotedIdentifier	matchgroup=plsqlOperator start=+n\?"+     end=+"+ keepend extend
-syn cluster plsqlIdentifiers contains=plsqlIdentifier,plsqlQuotedIdentifier
+syn cluster plsqlIdentifiers contains=plsqlIdentifier,plsqlQuotedIdentifier,plsqlSqlPlusDefine
 
 " quoted string literals
 if get(g:,"plsql_fold",0) == 1
-    syn region plsqlStringLiteral	matchgroup=plsqlOperator start=+n\?'+  skip=+''+    end=+'+ fold keepend extend
-    syn region plsqlStringLiteral	matchgroup=plsqlOperator start=+n\?q'\z([^[(<{]\)+    end=+\z1'+ fold keepend extend
-    syn region plsqlStringLiteral	matchgroup=plsqlOperator start=+n\?q'<+   end=+>'+ fold keepend extend
-    syn region plsqlStringLiteral	matchgroup=plsqlOperator start=+n\?q'{+   end=+}'+ fold keepend extend
-    syn region plsqlStringLiteral	matchgroup=plsqlOperator start=+n\?q'(+   end=+)'+ fold keepend extend
-    syn region plsqlStringLiteral	matchgroup=plsqlOperator start=+n\?q'\[+  end=+]'+ fold keepend extend
+    syn region plsqlStringLiteral	matchgroup=plsqlOperator start=+n\?'+  skip=+''+    end=+'+ contains=plsqlSqlplusDefine fold keepend extend
+    syn region plsqlStringLiteral	matchgroup=plsqlOperator start=+n\?q'\z([^[(<{]\)+    end=+\z1'+ contains=plsqlSqlplusDefine fold keepend extend
+    syn region plsqlStringLiteral	matchgroup=plsqlOperator start=+n\?q'<+   end=+>'+ contains=plsqlSqlplusDefine fold keepend extend
+    syn region plsqlStringLiteral	matchgroup=plsqlOperator start=+n\?q'{+   end=+}'+ contains=plsqlSqlplusDefine fold keepend extend
+    syn region plsqlStringLiteral	matchgroup=plsqlOperator start=+n\?q'(+   end=+)'+ contains=plsqlSqlplusDefine fold keepend extend
+    syn region plsqlStringLiteral	matchgroup=plsqlOperator start=+n\?q'\[+  end=+]'+ contains=plsqlSqlplusDefine fold keepend extend
 else
-    syn region plsqlStringLiteral	matchgroup=plsqlOperator start=+n\?'+  skip=+''+    end=+'+ 
-    syn region plsqlStringLiteral	matchgroup=plsqlOperator start=+n\?q'\z([^[(<{]\)+    end=+\z1'+ 
-    syn region plsqlStringLiteral	matchgroup=plsqlOperator start=+n\?q'<+   end=+>'+ 
-    syn region plsqlStringLiteral	matchgroup=plsqlOperator start=+n\?q'{+   end=+}'+ 
-    syn region plsqlStringLiteral	matchgroup=plsqlOperator start=+n\?q'(+   end=+)'+ 
-    syn region plsqlStringLiteral	matchgroup=plsqlOperator start=+n\?q'\[+  end=+]'+ 
+    syn region plsqlStringLiteral	matchgroup=plsqlOperator start=+n\?'+  skip=+''+    end=+'+ contains=plsqlSqlplusDefine
+    syn region plsqlStringLiteral	matchgroup=plsqlOperator start=+n\?q'\z([^[(<{]\)+    end=+\z1'+ contains=plsqlSqlplusDefine
+    syn region plsqlStringLiteral	matchgroup=plsqlOperator start=+n\?q'<+   end=+>'+ contains=plsqlSqlplusDefine
+    syn region plsqlStringLiteral	matchgroup=plsqlOperator start=+n\?q'{+   end=+}'+ contains=plsqlSqlplusDefine
+    syn region plsqlStringLiteral	matchgroup=plsqlOperator start=+n\?q'(+   end=+)'+ contains=plsqlSqlplusDefine
+    syn region plsqlStringLiteral	matchgroup=plsqlOperator start=+n\?q'\[+  end=+]'+ contains=plsqlSqlplusDefine
 endif
 
 syn keyword plsqlBooleanLiteral TRUE FALSE 
@@ -682,6 +689,10 @@
 syn match plsqlCase "\<END\>\_s\+\<CASE\>"
 syn match plsqlCase "\<CASE\>"
 
+syn region plsqlSqlPlusCommentL start="^\(REM\)\( \|$\)" skip="\\$" end="$" keepend extend contains=@plsqlCommentGroup,plsqlSpaceError,plsqlIllegalSpace
+syn region plsqlSqlPlusCommand  start="^\(SET\|DEFINE\|PROMPT\|ACCEPT\|EXEC\|HOST\|SHOW\|VAR\|VARIABLE\|COL\|WHENEVER\|TIMING\)\( \|$\)" skip="\\$" end="$" keepend extend
+syn region plsqlSqlPlusRunFile  start="^\(@\|@@\)" skip="\\$" end="$" keepend extend
+
 if get(g:,"plsql_fold",0) == 1
     setlocal foldmethod=syntax
     syn sync fromstart
@@ -826,6 +837,13 @@
 hi def link plsqlTrigger	        Function
 hi def link plsqlTypeAttribute      StorageClass
 hi def link plsqlTodo		        Todo
+
+hi def link plsqlIllegalSpace       Error
+hi def link plsqlSqlPlusDefine      PreProc
+hi def link plsqlSqlPlusCommand     PreProc
+hi def link plsqlSqlPlusRunFile     Include
+hi def link plsqlSqlPlusCommentL    Comment
+
 " to be able to change them after loading, need override whether defined or not
 if get(g:,"plsql_legacy_sql_keywords",0) == 1
     hi link plsqlSQLKeyword         Function