I got this error while pushing a bitcoin cash tx. earlier transactions were 
pushed without any error. please check this :
"
010000000365d8109a2a72b184271d91fa42eb979c64c75167ed02f88be4c5d27034e6e8e9000000006b483045022100a0ecffb050a6978816f27c162c77f05a4de2bc597ca5237bbf3603661318d41d022053875a6b98b51724267df8c2cd2cac60e67c50930ed3f8831c214ee18ff65c0d412103a587d9719f78f22781ab04f95132fb9e2ba295d1b22ff4626cf41d21a2b64fd8ffffffff33c7db59054b5b9d73882a600abab64c8fb46ba26f490b8528cbb133af2e97cb000000006a47304402201cd64c1a6269064eda620212410f249618d8f7318849a7b7e0429359b9cf1b83022026d5c455eedbcf152ff508c789963d215429c2143c90e23dbaf4adec75010c30412103a587d9719f78f22781ab04f95132fb9e2ba295d1b22ff4626cf41d21a2b64fd8ffffffff22b7242dca6102190d67a4d2c1a925bd90463e71c683e02666d22333ea3b4a09010000006b483045022100d1ce25aabab793672a4b5b854f79cfc920657cd5c56919ea535670262575164102203dc3bb4310f4acdb7b68988be420d02857ba9e0436533c3a8c7bd652ee87b16b412103a587d9719f78f22781ab04f95132fb9e2ba295d1b22ff4626cf41d21a2b64fd8ffffffff02c2d60000000000001976a914cf452d2b1a416bd3de2a776fd4087bf49641d61f88ac62170000000000001976a9142c4cf9c6666b2cbb93f76ec17183fca6bcec155088ac00000000
"

On Saturday, August 11, 2018 at 5:32:30 PM UTC+5:30, Тимур Панжиев wrote:
>
> Hi for everyone! Finally I found solution and what i was doing wrong. The 
> way of signing tx is totally correct, the problem was occurred in the other 
> thing. Before I want to broadcast tx I calculate fee per kb (not fixed 
> one). After signing tx - size of raw tx increses and fee amount 
> increases accordingly. After that I should provide new change for address 
> for change (value of the second output of tx). And after that I should sign 
> inputs one more time, because the value of the output for change was 
> changed. Unfortunately, I didn`t do this before.
>
> воскресенье, 5 августа 2018 г., 13:49:54 UTC+3 пользователь Тимур Панжиев 
> написал:
>>
>> Good day!
>> I`m working with low level API to make tx and sign it offline. But after 
>> all preparations I try to broadcast it and than i get an error from network:
>> *16: mandatory-script-verify-flag-failed (signature must be zero for 
>> failed check(multi)sig operation)*
>>
>> First of all I create tx without signing inputs, and after that i`m 
>> trying to sign every input with my priv keys. 
>>
>> *Here is raw tx before signing : *
>>
>> 01000000018bcf82619e93eb92cc78d5bb0b7b22d6ee419820428402e721fbac1386c9673f0000000000ffffffff02087f0300000000001976a9146fb643fe63bcc6c352899298d6072cc5d4178c0f88ace4570000000000001976a914196e59ee4c151e742af69bca308fc1b4445c577288ac00000000
>> *Parsing tx from the https://live.blockcypher.com/btc/decodetx/ 
>> <https://live.blockcypher.com/btc/decodetx/>  :*
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>> *{    "addresses": [        "16Yb7QP5jVmjXvHawH2ZA66k1b46FmtmE3",         
>> "1BBgML68FuyRwU8RzwYn1FvqAXDDSgjVKC",         
>> "13KU69194fJj13G1SajUWokudsuekhT1kw"    ],     "block_height": -1,     
>> "block_index": -1,     "confirmations": 0,     "double_spend": false,     
>> "fees": 0,     "hash": 
>> "1e3c06bfc2f2e91db9059a0db6dd78090f635b869feb31c3d51bc4a36ed88891",     
>> "inputs": [        {            "addresses": [                
>> "16Yb7QP5jVmjXvHawH2ZA66k1b46FmtmE3"            ],             "age": 
>> 534819,             "output_index": 0,             "output_value": 251628, 
>>             "prev_hash": 
>> "3f67c98613acfb21e7028442209841eed6227b0bbbd578cc92eb939e6182cf8b",         
>>     "script_type": "pay-to-pubkey-hash",             "sequence": 
>> 4294967295        }    ],     "outputs": [        {            "addresses": 
>> [                "1BBgML68FuyRwU8RzwYn1FvqAXDDSgjVKC"            ],         
>>     "script": "76a9146fb643fe63bcc6c352899298d6072cc5d4178c0f88ac",         
>>     "script_type": "pay-to-pubkey-hash",             "value": 229128        
>> },         {            "addresses": [                
>> "13KU69194fJj13G1SajUWokudsuekhT1kw"            ],             "script": 
>> "76a914196e59ee4c151e742af69bca308fc1b4445c577288ac",             
>> "script_type": "pay-to-pubkey-hash",             "value": 22500        }    
>> ],     "preference": "low",     "received": 
>> "2018-08-05T10:43:36.984631491Z",     "relayed_by": "54.234.76.246",     
>> "size": 119,     "total": 251628,     "ver": 1,     "vin_sz": 1,     
>> "vout_sz": 2}*
>>
>> Here is my code of signing every in:
>>
>> for (int i = 0; i < transaction.getInputs().size(); i++) {
>>
>>     TransactionInput transactionInput = transaction.getInput(i);
>>     String addressFromUtxo = mUTXOs.get(i).getAddress();
>>     byte[] privKeyBytes = *getPrivKeyBitesForAddress*(addressFromUtxo);
>>
>>     ECKey ecKey = ECKey.fromPrivate(privKeyBytes);
>>
>>     Script scriptPubKey = 
>> ScriptBuilder.createOutputScript(Address.fromBase58(params, 
>> mUTXOs.get(i).getAddress()));
>>
>>     Sha256Hash hash = transaction.hashForSignature(i, scriptPubKey, 
>> Transaction.SigHash.ALL, false);
>>     ECKey.ECDSASignature ecSig = ecKey.sign(hash);   
>>     TransactionSignature txSig = new TransactionSignature(ecSig, 
>> Transaction.SigHash.ALL, false);
>>     transactionInput.setScriptSig(ScriptBuilder.createInputScript(txSig, 
>> ecKey));
>> }
>>
>> //serialization and braodcasting
>>
>> byte[] bytesRawTransaction = transaction.bitcoinSerialize();
>> String rawTransaction3 = HEX.encode(bytesRawTransaction3);
>> broadcastTx(rawTransaction3);
>>
>>
>> And here how my raw tx looking after the signing:
>>
>>
>> 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
>>
>> *Parsing tx from the https://live.blockcypher.com/btc/decodetx/ 
>> <https://live.blockcypher.com/btc/decodetx/>  :*
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>> *{    "addresses": [        "16Yb7QP5jVmjXvHawH2ZA66k1b46FmtmE3",         
>> "13KU69194fJj13G1SajUWokudsuekhT1kw",         
>> "1BBgML68FuyRwU8RzwYn1FvqAXDDSgjVKC"    ],     "block_height": -1,     
>> "block_index": -1,     "confirmations": 0,     "double_spend": false,     
>> "fees": 55194,     "hash": 
>> "26859671de7bd5f0ab758517d90dcb2ef7c8a8a331a2d4fc59c7d98e07857d09",     
>> "inputs": [        {            "addresses": [                
>> "16Yb7QP5jVmjXvHawH2ZA66k1b46FmtmE3"            ],             "age": 
>> 534819,             "output_index": 0,             "output_value": 251628, 
>>             "prev_hash": 
>> "3f67c98613acfb21e7028442209841eed6227b0bbbd578cc92eb939e6182cf8b",         
>>     "script": 
>> "473044022054720cc14562000ed1a6fa7952d2343bef48e2fa4fd0f1c1894579026ae83692022042735beb03c4d53c8d72126e1e4e8bee7acd5530284b05d6707a4e71cc891e9a01210312e1997fc0cb4c037c94885e7e4a8d0eca9d5cff8628cc3d870e5c158c9b0901",
>>  
>>             "script_type": "pay-to-pubkey-hash",             "sequence": 
>> 4294967295        },         {            "addresses": [                
>> "13KU69194fJj13G1SajUWokudsuekhT1kw"            ],             "age": 
>> 534818,             "output_index": 1,             "output_value": 125872, 
>>             "prev_hash": 
>> "dd1ac371055ae2ed45af80de3b68d5fe31d5c0c7f0d4dccd9552af97cda10ed5",         
>>     "script": 
>> "47304402206a70b6dacea9e9435c21fe920471daccf2edb636592b9d9163b1f5d740e582e102203416f80e9859fcfacc9f41ea3e04774ef47c9b0b9fa5a61f2b77dffee4c2710e012103522a472dd00a929e0f0980b98eb6a0d10a6e5a6ff7d45709cdb9f022b881ca66",
>>  
>>             "script_type": "pay-to-pubkey-hash",             "sequence": 
>> 4294967295        }    ],     "outputs": [        {            "addresses": 
>> [                "1BBgML68FuyRwU8RzwYn1FvqAXDDSgjVKC"            ],         
>>     "script": "76a9146fb643fe63bcc6c352899298d6072cc5d4178c0f88ac",         
>>     "script_type": "pay-to-pubkey-hash",             "value": 229128        
>> },         {            "addresses": [                
>> "13KU69194fJj13G1SajUWokudsuekhT1kw"            ],             "script": 
>> "76a914196e59ee4c151e742af69bca308fc1b4445c577288ac",             
>> "script_type": "pay-to-pubkey-hash",             "value": 93178        }    
>> ],     "preference": "high",     "received": 
>> "2018-08-05T10:44:42.584042561Z",     "relayed_by": "54.162.141.93",     
>> "size": 372,     "total": 322306,     "ver": 1,     "vin_sz": 2,     
>> "vout_sz": 2}*
>> And after all above I got: *16: mandatory-script-verify-flag-failed 
>> (signature must be zero for failed check(multi)sig operation)*
>>
>> Please, help me, what I`m doing wrong???
>>
>

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