diff --git a/source/APLProcess.dyalog b/source/APLProcess.dyalog
index d1714e6..0cf2a57 100644
--- a/source/APLProcess.dyalog
+++ b/source/APLProcess.dyalog
@@ -5,7 +5,7 @@
 
     ∇ r←Version
       :Access Public Shared
-      r←'APLProcess' '2.3.0' '2024-07-06'
+      r←'APLProcess' '2.3.1' '2025-09-09'
     ∇
 
     :Field Public Args←''
@@ -453,8 +453,12 @@
       :If {2::0 ⋄ IsSsh}'' ⍝ instance?
           ∘∘∘
       :Else
-          →(r←' '∨.≠txt←⊃_SH'ps -o comm -p ',(⍕pid),' | sed -n ''2,$p''')↓0
-          r←~∨/'<defunct>'⍷txt
+          :If IsAIX
+              txt←⊃_SH'ps -p "',(⍕pid),'" -o s='
+          :Else
+              txt←⊃_SH'ps -p "',(⍕pid),'" -o state='
+          :EndIf
+          r←(~'Z'∊txt)∧(∨/txt≠' ')∧0<≢txt
       :EndIf
     ∇