diff --git a/synapse/exc.py b/synapse/exc.py
index fe115b6305..8c5b2ef752 100644
--- a/synapse/exc.py
+++ b/synapse/exc.py
@@ -56,9 +56,14 @@ def setdefault(self, name, valu):
         self.errinfo[name] = valu
         self._setExcMesg()
 
+    def update(self, items: dict):
+        '''Update multiple items in the errinfo dict at once.'''
+        self.errinfo.update(**items)
+        self._setExcMesg()
+
 class StormRaise(SynErr):
     '''
-    This represents a user provided exception inside of a Storm runtime. It requires a errname key.
+    This represents a user provided exception raised in the Storm runtime. It requires a errname key.
     '''
     def __init__(self, *args, **info):
         SynErr.__init__(self, *args, **info)
diff --git a/synapse/lib/ast.py b/synapse/lib/ast.py
index a934853308..dce4d2eed9 100644
--- a/synapse/lib/ast.py
+++ b/synapse/lib/ast.py
@@ -60,7 +60,7 @@ def getPosInfo(self):
 
     def addExcInfo(self, exc):
         if 'highlight' not in exc.errinfo:
-            exc.errinfo['highlight'] = self.getPosInfo()
+            exc.set('highlight', self.getPosInfo())
         return exc
 
     def repr(self):
diff --git a/synapse/lib/parser.py b/synapse/lib/parser.py
index 798058c66b..614f0ab7c3 100644
--- a/synapse/lib/parser.py
+++ b/synapse/lib/parser.py
@@ -507,7 +507,7 @@ def _larkToSynExc(self, e):
             origexc = e.orig_exc
             if not isinstance(origexc, s_exc.SynErr):
                 raise e.orig_exc # pragma: no cover
-            origexc.errinfo['text'] = self.text
+            origexc.set('text', self.text)
             return s_exc.BadSyntax(**origexc.errinfo)
 
         elif isinstance(e, lark.exceptions.UnexpectedCharacters):  # pragma: no cover
diff --git a/synapse/lib/snap.py b/synapse/lib/snap.py
index 511b3665b2..656f44a252 100644
--- a/synapse/lib/snap.py
+++ b/synapse/lib/snap.py
@@ -363,9 +363,9 @@ async def _set(self, prop, valu, norminfo=None, ignore_ro=False):
                 valu, norminfo = prop.type.norm(valu)
             except s_exc.BadTypeValu as e:
                 oldm = e.errinfo.get('mesg')
-                e.errinfo['prop'] = prop.name
-                e.errinfo['form'] = prop.form.name
-                e.errinfo['mesg'] = f'Bad prop value {prop.full}={valu!r} : {oldm}'
+                e.update({'prop': prop.name,
+                          'form': prop.form.name,
+                          'mesg': f'Bad prop value {prop.full}={valu!r} : {oldm}'})
                 if self.ctx.snap.strict:
                     raise e
                 await self.ctx.snap.warn(e)
@@ -493,7 +493,7 @@ async def _addNode(self, form, valu, props=None, norminfo=None):
             try:
                 valu, norminfo = form.type.norm(valu)
             except s_exc.BadTypeValu as e:
-                e.errinfo['form'] = form.name
+                e.set('form', form.name)
                 if self.snap.strict: raise e
                 await self.snap.warn(f'addNode() BadTypeValu {form.name}={valu} {e}')
                 return None