diff --git a/src/syscap_tool.c b/src/syscap_tool.c
index 6b04e2c..3e27adb 100644
--- a/src/syscap_tool.c
+++ b/src/syscap_tool.c
@@ -474,13 +474,20 @@ int32_t EncodeRpcidscToString(char *inputFile, char *outDirPath)
     // trans to string format
     freeAfterEncodeRpcidscInfo.sysCapDefine =  CreateWholeSyscapJsonObj();
     sysCapArray = cJSON_GetObjectItem(freeAfterEncodeRpcidscInfo.rpcidRoot, "syscap");
-    if (sysCapArray == NULL || !cJSON_IsArray(sysCapArray)) {
+    if (sysCapArray == NULL) {
+        PRINT_ERR("syscap array is null. Input file: %s\n", inputFile);
+        return FreeAfterEncodeRpcidsc(freeAfterEncodeRpcidscInfo, FREE_WHOLE_SYSCAP_AFTER_RPCIDSC, ret);
+    }
+    if (!cJSON_IsArray(sysCapArray)) {
         PRINT_ERR("Get syscap failed. Input file: %s\n", inputFile);
+        sysCapArray = NULL;
         return FreeAfterEncodeRpcidsc(freeAfterEncodeRpcidscInfo, FREE_WHOLE_SYSCAP_AFTER_RPCIDSC, ret);
     }
     sysCapArraySize = cJSON_GetArraySize(sysCapArray);
     if (sysCapArraySize < 0) {
         PRINT_ERR("Get syscap size failed. Input file: %s\n", inputFile);
+        sysCapArray = NULL;
+        sysCapArraySize = NULL;
         return FreeAfterEncodeRpcidsc(freeAfterEncodeRpcidscInfo, FREE_WHOLE_SYSCAP_AFTER_RPCIDSC, ret);
     }
     // malloc for save os syscap index
@@ -492,6 +499,7 @@ int32_t EncodeRpcidscToString(char *inputFile, char *outDirPath)
 
     ret = OutputSetMemAndPrintToFile(freeAfterEncodeRpcidscInfo, sysCapArraySize, sysCapArray, outDirPath);
     if (freeAfterEncodeRpcidscInfo.flag == 1) {
+        freeAfterEncodeRpcidscInfo.osSysCapIndex = NULL;
         return FreeAfterEncodeRpcidsc(freeAfterEncodeRpcidscInfo, freeAfterEncodeRpcidscInfo.type, ret);
     }
     return FreeAfterEncodeRpcidsc(freeAfterEncodeRpcidscInfo, FREE_OUTBUFFER_AFTER_RPCIDSC, ret);