diff --git a/imod/formats/prj/prj.py b/imod/formats/prj/prj.py
index dd9859a92..726f942b8 100644
--- a/imod/formats/prj/prj.py
+++ b/imod/formats/prj/prj.py
@@ -451,6 +451,8 @@ def _parse_block(lines: _LineIterator, content: Dict[str, Any]) -> None:
     while key is None and not lines.finished:
         n, key, active = _parse_blockheader(lines)
 
+    if key is None:
+        return
     try:
         if key in KEYS:
             if n != 1:
@@ -482,7 +484,9 @@ def _parse_block(lines: _LineIterator, content: Dict[str, Any]) -> None:
             )
 
     except Exception as e:
-        raise type(e)(f"{e}\nError occurred for keyword: {key}")
+        raise type(e)(
+            f"{e}\nError occurred for keyword: {key} in line {lines.count + 1}"
+        )
 
     if blockcontent is not None and active is not None:
         blockcontent["active"] = active
diff --git a/imod/tests/test_formats/test_prj.py b/imod/tests/test_formats/test_prj.py
index b5d07f419..9d79382e5 100644
--- a/imod/tests/test_formats/test_prj.py
+++ b/imod/tests/test_formats/test_prj.py
@@ -94,6 +94,8 @@
         1,2, 000, 100000.0, 1.0, -999.9900 ,"{basepath}/first.gen"
         1,2, 000, 100000.0, 1.0, -999.9900 ,"{basepath}/second.gen"
 
+
+
     0001,(PCG),1, Precondition Conjugate-Gradient,[]
         MXITER=  500
         ITER1=   25
@@ -118,6 +120,7 @@
     "benzene",1
     "chloride",2
 
+
     """
 )