diff --git a/HealBotBlue.toc b/HealBotBlue.toc
index 16457b5..6e3c938 100644
--- a/HealBotBlue.toc
+++ b/HealBotBlue.toc
@@ -1,6 +1,6 @@
 ## Interface: 11200
 ## Title: HealBotBlue
-## Version: 1.7.6
+## Version: 1.7.7
 ## Author: Bluewhale
 ## Notes: Raidframe replacement for healing, decursing, resource tracking and buffing with optional support for SuperWow, ClassicAPI, UnitXP_SP3 and Nampower.
 ## SavedVariablesPerCharacter:  HealBot_Config
diff --git a/HealBot_View_Layout.lua b/HealBot_View_Layout.lua
index 29e0bc1..2a015f7 100644
--- a/HealBot_View_Layout.lua
+++ b/HealBot_View_Layout.lua
@@ -667,8 +667,8 @@ function HealBot_Action_PartyChanged()
                 local unit = "Test" .. j
                 HealBot_Action_SetHealButton(i, unit)
                 if not HealBot_Model.units[unit] then
-                    local rClass = testClasses[math.random(1, #testClasses)]
-                    local rName = testNames[math.random(1, #testNames)] .. j
+                    local rClass = testClasses[math.random(1, table.getn(testClasses))]
+                    local rName = testNames[math.random(1, table.getn(testNames))] .. j
                     local mHealth = math.random(4000, 8000)
                     local cHealth = math.random(1, mHealth)
                     local pt = 0
@@ -684,7 +684,7 @@ function HealBot_Action_PartyChanged()
                         "Interface\\Icons\\Spell_Holy_Excorcism" -- Fear Ward
                     }
                     -- Shuffle icons
-                    for k = #testIcons, 2, -1 do
+                    for k = table.getn(testIcons), 2, -1 do
                         local j = math.random(k)
                         testIcons[k], testIcons[j] = testIcons[j], testIcons[k]
                     end
diff --git a/README.md b/README.md
index 1beaca0..97f6010 100644
--- a/README.md
+++ b/README.md
@@ -50,6 +50,9 @@ Default installation path: `C:\Program Files\World of Warcraft\Interface\AddOns\
 
 ### Change Log
 
+**v1.7.7**
+* **Bug Fix - Lua 5.0 Compatibility (Test Bars):** Replaced Lua 5.1 `#` length operators with `table.getn` in test bar generator, resolving `unexpected symbol near '#'` in `HealBot_View_Layout.lua` and resulting `attempt to call global 'HealBot_Action_ResetSkin' (a nil value)` startup crash on Vanilla 1.12.
+
 **v1.7.6**
 * **Feature - All-Class Support & Raid Frame Replacement:** Removed legacy restriction that disabled HealBot event listeners and UI frames for classes without native healing spells. HealBot now initializes and functions as a full party/raid frame replacement for all classes (Warrior, Mage, Rogue, Hunter, Warlock).
 * **Targeting & Binding Defaults:** Added default `Left` click `"Target"` binding for non-healer classes, recognized `"target"` in spell resolution, and prevented non-healer buttons from disabling on full-health allies.