diff --git a/nimterop/globals.nim b/nimterop/globals.nim
index e0b9b8f..17b9518 100644
--- a/nimterop/globals.nim
+++ b/nimterop/globals.nim
@@ -55,6 +55,7 @@ type
       identifiers*: TableRef[string, string] # Symbols that have been declared so far indexed by nimName
       skippedSyms*: HashSet[string]          # Symbols that have been skipped due to being unwrappable or
                                              # the user provided override is blank
+      headersProcessed*: HashSet[string]     # Headers already processed directly or recursively
 
       # Nim compiler objects
       constSection*, enumSection*, pragmaSection*, procSection*, typeSection*, varSection*: PNode
diff --git a/nimterop/toast.nim b/nimterop/toast.nim
index fbaa960..1cda239 100644
--- a/nimterop/toast.nim
+++ b/nimterop/toast.nim
@@ -136,7 +136,11 @@ proc main(
       gecho preMainOut
       gState.initNim()
     for src in source:
-      gState.process(src.expandSymlinkAbs())
+      let
+        src = src.expandSymlinkAbs()
+      if src notin gState.headersProcessed:
+        gState.process(src)
+        gState.headersProcessed.incl src
     if gState.pnim:
       printNim(gState)
 
diff --git a/nimterop/toastlib/ast2.nim b/nimterop/toastlib/ast2.nim
index dc4d220..43ec8d3 100644
--- a/nimterop/toastlib/ast2.nim
+++ b/nimterop/toastlib/ast2.nim
@@ -137,7 +137,7 @@ proc newConstDef(gState: State, node: TSNode, fname = "", fval = ""): PNode =
       # In case symbol was skipped earlier
       gState.skippedSyms.excl origname
     else:
-      gecho &"# const '{origname}' is duplicate, skipped"
+      decho &"const '{origname}' is duplicate, skipped"
   else:
     gecho &"# const '{origname}' has unsupported value '{val.strip()}'"
     gState.skippedSyms.incl origname
@@ -391,7 +391,7 @@ proc newXIdent(gState: State, node: TSNode, kind = nskType, fname = "", pragmas:
 
     gState.identifierNodes[name] = result
   else:
-    gecho &"# {getKeyword(kind)} '{origname}' is duplicate, skipped"
+    decho &"{getKeyword(kind)} '{origname}' is duplicate, skipped"
 
 proc newArrayTree(gState: State, node: TSNode, typ, size: PNode = nil): PNode =
   # Create nkBracketExpr tree depending on input
@@ -1706,6 +1706,9 @@ proc addDef(gState: State, node: TSNode) =
     fdecl = node[start+1].firstChildInTree("function_declarator")
 
   if not fdecl.isNil:
+    if gState.getNodeError(fdecl):
+      return
+
     if not gState.noHeader:
       gState.addProc(node[start+1], node[start], commentNodes)
     else:
@@ -1716,19 +1719,14 @@ proc processNode(gState: State, node: TSNode): Status =
   const
     known = ["preproc_def", "type_definition",
       "struct_specifier", "union_specifier", "enum_specifier",
-      "declaration", "function_definition"].toHashSet()
+      "declaration"].toHashSet()
 
   result = success
   let
     name = node.getName()
   if name in known:
     # Recognized top-level nodes
-    let
-      err = node.anyChildInTree("ERROR")
-    if not err.isNil:
-      # Bail on errors
-      gState.printDebug(node)
-      gecho &"# tree-sitter parse error: '{gState.getNodeVal(node).splitLines()[0]}', skipped"
+    if gState.getNodeError(node):
       result = Status.error
     else:
       # Process nodes
@@ -1750,8 +1748,11 @@ proc processNode(gState: State, node: TSNode): Status =
         gState.addEnum(node)
       of "declaration":
         gState.addDecl(node)
-      of "function_definition":
-        gState.addDef(node)
+  elif name == "function_definition":
+    # Separate since we only need to check function_declarator for errors and
+    # not the compound_statement which could have errors but does not impact
+    # wrapper generation
+    gState.addDef(node)
   else:
     # Unknown, will check child nodes
     result = unknown
diff --git a/nimterop/toastlib/getters.nim b/nimterop/toastlib/getters.nim
index 08ba604..bfbd4be 100644
--- a/nimterop/toastlib/getters.nim
+++ b/nimterop/toastlib/getters.nim
@@ -315,6 +315,7 @@ proc getPreprocessor*(gState: State, fullpath: string) =
     p = startProcess(getCompiler(), args = args, options = {poStdErrToStdOut, poUsePath})
     outp = p.outputStream()
     line = ""
+    newHeaders: HashSet[string]
 
   # Include content only from file
   gState.code = ""
@@ -323,17 +324,19 @@ proc getPreprocessor*(gState: State, fullpath: string) =
       # We want to keep blank lines here for comment processing
       if line.len > 1 and line[0] == '#' and line[1] == ' ':
         start = false
-        line = line.sanitizePath(noQuote = true)
-        if sfile in line or
-          (DirSep notin line and sfileName in line):
+        line = line.split('"')[1].sanitizePath(noQuote = true)
+        if sfile == line or
+          (DirSep notin line and sfileName == line):
           start = true
         elif gState.recurse:
-          if pDir.Bl or pDir in line:
+          if (pDir.Bl or pDir in line) and line notin gState.headersProcessed:
             start = true
+            newHeaders.incl line
           else:
             for inc in includeDirs:
-              if inc in line:
+              if line.startsWith(inc) and line notin gState.headersProcessed:
                 start = true
+                newHeaders.incl line
                 break
       else:
         if start:
@@ -342,6 +345,7 @@ proc getPreprocessor*(gState: State, fullpath: string) =
           gState.code.add line & "\n"
     elif not p.running(): break
   p.close()
+  gState.headersProcessed.incl newHeaders
 
 # Plugin related
 
@@ -393,3 +397,4 @@ proc expandSymlinkAbs*(path: string): string =
     result = path.expandFilename().normalizedPath()
   except:
     result = path
+  result = result.sanitizePath(noQuote = true)
\ No newline at end of file
diff --git a/nimterop/toastlib/tshelp.nim b/nimterop/toastlib/tshelp.nim
index 3b7c2cc..bbe029f 100644
--- a/nimterop/toastlib/tshelp.nim
+++ b/nimterop/toastlib/tshelp.nim
@@ -399,3 +399,12 @@ proc getTSNodeNamedChildNames*(node: TSNode): seq[string] =
 
       if name != "comment":
         result.add(name)
+
+proc getNodeError*(gState: State, node: TSNode): bool =
+  let
+    err = node.anyChildInTree("ERROR")
+  if not err.isNil:
+    # Bail on errors
+    gState.printDebug(node)
+    gecho &"# tree-sitter parse error: '{gState.getNodeVal(node).splitLines()[0]}', skipped"
+    result = true
\ No newline at end of file