diff --git a/Module.mk b/Module.mk
index 4178a42..fc341be 100644
--- a/Module.mk
+++ b/Module.mk
@@ -91,6 +91,7 @@ include src/main/acioemu/Module.mk
 include src/main/aciomgr/Module.mk
 include src/main/aciotest/Module.mk
 include src/main/asio/Module.mk
+include src/main/avs-util/Module.mk
 include src/main/bio2drv/Module.mk
 include src/main/bio2emu-iidx/Module.mk
 include src/main/bio2emu/Module.mk
diff --git a/src/main/avs-util/Module.mk b/src/main/avs-util/Module.mk
new file mode 100644
index 0000000..8db0691
--- /dev/null
+++ b/src/main/avs-util/Module.mk
@@ -0,0 +1,6 @@
+libs            += avs-util
+
+libs_avs-util     := \
+
+src_avs-util     := \
+    error.c \
diff --git a/src/main/avs-util/error.c b/src/main/avs-util/error.c
new file mode 100644
index 0000000..ab09c01
--- /dev/null
+++ b/src/main/avs-util/error.c
@@ -0,0 +1,99 @@
+#include "avs-util/error.h"
+
+#include "util/defs.h"
+
+struct avs_util_avs_error_str {
+    avs_error error;
+    const char *msg;
+};
+
+static const char *avs_util_error_unknown = "unknown error";
+
+// Source: https://github.com/spicetools/spicetools
+static const struct avs_util_avs_error_str AVS_UTIL_ERRORS[] = {
+    {0x80092000, "invalid type"},
+    {0x80092001, "type cannot use as array"},
+    {0x80092002, "invalid"},
+    {0x80092003, "too large data size"},
+    {0x80092004, "too small buffer size"},
+    {0x80092005, "passcode 0 is not allowed"},
+    {0x80092040, "invalid node name"},
+    {0x80092041, "invalid attribute name"},
+    {0x80092042, "reserved attribute name"},
+    {0x80092043, "cannot find node/attribute"},
+    {0x80092080, "cannot allocate node"},
+    {0x80092081, "cannot allocate node value"},
+    {0x80092082, "cannot allocate mdigest for finger-print"},
+    {0x80092083, "cannot allocate nodename"},
+    {0x800920C0, "node type differs"},
+    {0x800920C1, "node type is VOID"},
+    {0x800920C2, "node is array"},
+    {0x800920C3, "node is not array"},
+    {0x80092100, "node is create-disabled"},
+    {0x80092101, "node is read-disabled"},
+    {0x80092102, "node is write-disabled"},
+    {0x80092103, "flag is already locked"},
+    {0x80092104, "passcode differs"},
+    {0x80092105, "insert_read() is applied to attribute"},
+    {0x80092106, "part_write() is applied to attribute"},
+    {0x80092107, "MODE_EXTEND flag differs"},
+    {0x80092140, "root node already exists"},
+    {0x80092141, "attribute cannot have children"},
+    {0x80092142, "node/attribute already exists"},
+    {0x80092143, "number of nodes exceeds 65535"},
+    {0x80092144, "cannot interpret as number"},
+    {0x80092145, "property is empty"},
+    {0x80092180, "I/O error"},
+    {0x80092181, "unexpected EOF"},
+    {0x80092182, "unknown format"},
+    {0x800921C0, "broken magic"},
+    {0x800921C1, "broken metadata"},
+    {0x800921C2, "broken databody"},
+    {0x800921C3, "invalid type"},
+    {0x800921C4, "too large data size"},
+    {0x800921C5, "too long node/attribute name"},
+    {0x800921C6, "attribute name is too long"},
+    {0x800921C7, "node/attribute already exists"},
+    {0x80092200, "invalid encoding"},
+    {0x80092201, "invalid XML token"},
+    {0x80092202, "XML syntax error"},
+    {0x80092203, "start tag / end tag mismatch"},
+    {0x80092204, "too large node data (__size mismatch)"},
+    {0x80092205, "too deep node tree"},
+    {0x80092206, "invalid type"},
+    {0x80092207, "invalid size"},
+    {0x80092208, "invalid count"},
+    {0x80092209, "invalid value"},
+    {0x8009220A, "invalid node name"},
+    {0x8009220B, "invalid attribute name"},
+    {0x8009220C, "reserved attribute name"},
+    {0x8009220D, "node/attribute already exists"},
+    {0x8009220E, "too many elements in node data"},
+    {0x80092240, "JSON syntax error"},
+    {0x80092241, "invalid JSON literal"},
+    {0x80092242, "invalid JSON number"},
+    {0x80092243, "invalid JSON string"},
+    {0x80092244, "invalid JSON object name"},
+    {0x80092245, "object name already exists"},
+    {0x80092246, "too long JSON object name"},
+    {0x80092247, "too deep JSON object/array nesting"},
+    {0x80092248, "cannot convert JSON array to property"},
+    {0x80092249, "cannot convert empty JSON object to property"},
+    {0x8009224A, "root node already exists"},
+    {0x8009224B, "cannot convert root node to TYPE_ARRAY"},
+    {0x8009224C, "name represents reserved attribute"},
+    {0x80092280, "finger-print differs"},
+    {0x800922C0, "operation is not supported"}};
+
+const char *avs_util_error_str(avs_error error)
+{
+    int i;
+
+    for (i = 0; i < lengthof(AVS_UTIL_ERRORS); i++) {
+        if (error == AVS_UTIL_ERRORS[i].error) {
+            return AVS_UTIL_ERRORS[i].msg;
+        }
+    }
+
+    return avs_util_error_unknown;
+}
\ No newline at end of file
diff --git a/src/main/avs-util/error.h b/src/main/avs-util/error.h
new file mode 100644
index 0000000..3598851
--- /dev/null
+++ b/src/main/avs-util/error.h
@@ -0,0 +1,8 @@
+#ifndef AVS_UTIL_ERROR_H
+#define AVS_UTIL_ERROR_H
+
+#include "imports/avs.h"
+
+const char *avs_util_error_str(avs_error error);
+
+#endif
\ No newline at end of file