diff --git a/src/import/generic/memory/lib/utils/shared/mss_generic_consts.H b/src/import/generic/memory/lib/utils/shared/mss_generic_consts.H
index e7954bdd9..d378179d4 100644
--- a/src/import/generic/memory/lib/utils/shared/mss_generic_consts.H
+++ b/src/import/generic/memory/lib/utils/shared/mss_generic_consts.H
@@ -78,6 +78,11 @@ enum conversions
     BITS_PER_BYTE = 8,
 };
 
+enum generic_sizes
+{
+    NUM_MAX_FREQS = 5,             ///< Used for ATTR_MAX_ALLOWED_DIMM_FREQ
+};
+
 ///
 /// @brief FFDC generic codes
 ///
@@ -118,16 +123,25 @@ enum generic_ffdc_codes
     BAD_SPD_DATA = 0x101D,
     SET_FIELD = 0x101E,
 
+    // mss_freq functions
     SELECT_SUPPORTED_FREQ = 0x101F,
+    FREQ_SCOREBOARD_REMOVE_FREQS_ABOVE_LIMIT = 0x1020,
+    FREQ_SCOREBOARD_REMOVE_FREQS_ABOVE_LIMIT_VECTOR = 0x1021,
+    FREQ_SCOREBOARD_REMOVE_FREQS_NOT_ON_LIST = 0x1022,
+    FREQ_SCOREBOARD_MAX_SUPPORTED_FREQ = 0x1023,
+    FREQ_SCOREBOARD_SUPPORTED_FREQS = 0x1024,
+    LIMIT_FREQ_BY_VPD = 0x1025,
 };
 
 ///
 /// @brief Supported proc types
+/// @note Processor types by system generation and sub numbering
 ///
-enum proc_type
+enum class proc_type
 {
-    NIMBUS,
-    AXONE,
+    NIMBUS  = 0x0900,
+    CUMULUS = 0x0901,
+    AXONE   = 0x0902,
 };
 
 ///
diff --git a/src/import/generic/procedures/xml/error_info/generic_error.xml b/src/import/generic/procedures/xml/error_info/generic_error.xml
index b0445e6f5..281c2d2dd 100644
--- a/src/import/generic/procedures/xml/error_info/generic_error.xml
+++ b/src/import/generic/procedures/xml/error_info/generic_error.xml
@@ -37,6 +37,25 @@
 
 <hwpErrors>
 
+  <hwpError>
+    <rc>RC_MSS_BAD_FREQ_CALCULATED</rc>
+    <description>
+        No frequency found for MC Either bad mrw attribute or no DIMMS installed?
+        Should be a code bug if we get here
+    </description>
+    <ffdc>MSS_FREQ</ffdc>
+    <ffdc>SUPPORTED_FREQ_0</ffdc>
+    <ffdc>SUPPORTED_FREQ_1</ffdc>
+    <ffdc>SUPPORTED_FREQ_2</ffdc>
+    <ffdc>SUPPORTED_FREQ_3</ffdc>
+    <ffdc>TARGET</ffdc>
+    <ffdc>PROC_TYPE</ffdc>
+    <callout>
+      <procedure>CODE</procedure>
+      <priority>HIGH</priority>
+    </callout>
+  </hwpError>
+
   <hwpError>
     <rc>RC_MSS_EMPTY_VECTOR</rc>
     <description>
@@ -215,6 +234,17 @@
   </callout>
 </hwpError>
 
+  <hwpError>
+    <rc>RC_MSS_INVALID_PORT_INDEX_PASSED</rc>
+    <description>An invalid port index was passed into an MSS function</description>
+    <ffdc>INDEX</ffdc>
+    <ffdc>FUNCTION</ffdc>
+    <callout>
+      <procedure>CODE</procedure>
+      <priority>HIGH</priority>
+    </callout>
+  </hwpError>
+
   <hwpError>
     <rc>RC_MSS_INVALID_TIMING_VALUE</rc>
     <description>Invalid value calculated for timing value based on MTB and FTB from SPD.</description>
@@ -232,4 +262,40 @@
     </gard>
   </hwpError>
 
+<hwpError>
+  <rc>RC_MSS_LOOKUP_FAILED</rc>
+  <description>
+    Conditional that tests whether a certain key value is located in a map.
+  </description>
+  <ffdc>KEY</ffdc>
+  <ffdc>DATA</ffdc>
+  <ffdc>FUNCTION</ffdc>
+  <callout>
+    <target>TARGET</target>
+    <priority>MEDIUM</priority>
+  </callout>
+  <deconfigure>
+    <target>TARGET</target>
+  </deconfigure>
+</hwpError>
+
+  <hwpError>
+    <rc>RC_MSS_PORT_DOES_NOT_SUPPORT_MAJORITY_FREQ</rc>
+    <description>
+      When considering the frequencies in the MRW and the max supported
+      frequencies based on DIMM config, the indicated port's DIMM do not support
+      the frequency of the majority of other ports' DIMM, so it will be deconfigured
+    </description>
+    <ffdc>FREQ_TARGET</ffdc>
+    <ffdc>PORT_TARGET</ffdc>
+    <ffdc>FREQUENCY</ffdc>
+     <callout>
+      <childTargets>
+          <parent>PORT_TARGET</parent>
+          <childType>TARGET_TYPE_DIMM</childType>
+      </childTargets>
+      <priority>MEDIUM</priority>
+    </callout>
+  </hwpError>
+
 </hwpErrors>