O XML é esse:
<?xml version=”1.0″ encoding=”UTF-8″ ?>
<CFeCanc>
<infCFe chCanc=”CFe35170608723218000186599000120290000169126724″>
<ide>
<CNPJ>16716114000172</CNPJ>
<signAC>SGR-SAT SISTEMA DE GESTAO E RETAGUARDA DO SAT</signAC>
<numeroCaixa>001</numeroCaixa>
</ide>
<emit></emit>
<dest></dest>
<total></total>
</infCFe>
</CFeCanc>

Por favor, você poderia enviar o xml da venda para analisarmos?
Uma coisa que pode auxilia-lo é o uso da ferramenta de auxilio ao desenvolvimento InteliSat disponível na áreas de suporte do sita da Tanca. Lá você pode emitir o cupom e solicitar que seja gerado o xml para cancelamento do mesmo.

<CFe><infCFe Id=”CFe35170608723218000186599000120290000169126724″ versao=”0.07″ versaoDadosEnt=”0.07″ versaoSB=”020200″><ide><cUF>35</cUF><cNF>912672</cNF><mod>59</mod><nserieSAT>900012029</nserieSAT><nCFe>000016</nCFe><dEmi>20170623</dEmi><hEmi>113338</hEmi><cDV>4</cDV><tpAmb>2</tpAmb><CNPJ>16716114000172</CNPJ><signAC>SGR-SAT SISTEMA DE GESTAO E RETAGUARDA DO SAT</signAC><assinaturaQRCODE>kCQJHPFnl1HiW2tI2b1M5QKnJwMsW0Kfo5TUwcMQNgnroCxGe3ifx3D5FlZVrRuHhpkSkB1GeJP8RAlRdMUPTJwdOBfhkSHRnB+urNOca7jTXUp7/BsU6REvgs9ZPOCXUteaPeAcHpu2bon63K4uDCsP5Iz5xXg91Sm+YYMoUk0ljamb5y3MPan8MK1aflmLOCg65M1FajDIT8osuNN4sO1dSRU9A4MjdFN/IUI+qk8rc+k+LGY1njsYINFL8PknjmhY7XbB+S80NX6O3ZuCBgJioDWe9Nlwesshy4Aoeio747dJfeDcadKPGw39aC4mmPLHPcSNSUSDkZMZ7LIUrg==</assinaturaQRCODE><numeroCaixa>001</numeroCaixa></ide><emit><CNPJ>08723218000186</CNPJ><xNome>TANCA INFORMATICA EIRELI</xNome><xFant>TANCA</xFant><enderEmit><xLgr>RUA MARECHAL FLORIANO PEIXOTO</xLgr><nro>166</nro><xBairro>VILA MARCONDES</xBairro><xMun>PRESIDENTE PRUDENTE</xMun><CEP>19030020</CEP></enderEmit><IE>149626224113</IE><cRegTrib>3</cRegTrib><indRatISSQN>N</indRatISSQN></emit><dest></dest><det nItem=”1″><prod><cProd>3245</cProd><cEAN>7896658001918</cEAN><xProd>MAIONESE ARISCO 300GRS</xProd><NCM>39233000</NCM><CFOP>5102</CFOP><uCom>UN</uCom><qCom>1.0000</qCom><vUnCom>7.50</vUnCom><vProd>7.50</vProd><indRegra>A</indRegra><vItem>7.50</vItem><vRatDesc>0.00</vRatDesc><vRatAcr>0.00</vRatAcr></prod><imposto><vItem12741>1.35</vItem12741><ICMS><ICMSSN102><Orig>0</Orig><CSOSN>300</CSOSN></ICMSSN102></ICMS><PIS><PISSN><CST>49</CST></PISSN></PIS><COFINS><COFINSSN><CST>49</CST></COFINSSN></COFINS></imposto></det><total><ICMSTot><vICMS>0.00</vICMS><vProd>7.50</vProd><vDesc>0.00</vDesc><vPIS>0.00</vPIS><vCOFINS>0.00</vCOFINS><vPISST>0.00</vPISST><vCOFINSST>0.00</vCOFINSST><vOutro>0.00</vOutro></ICMSTot><vCFe>7.50</vCFe><vCFeLei12741>1.35</vCFeLei12741></total><pgto><MP><cMP>01</cMP><vMP>10.00</vMP></MP><vTroco>2.50</vTroco></pgto><infAdic><obsFisco xCampo=”xCampo1″><xTexto>xTexto1</xTexto></obsFisco></infAdic></infCFe><Signature xmlns=”http://www.w3.org/2000/09/xmldsig#”><SignedInfo><CanonicalizationMethod Algorithm=”http://www.w3.org/TR/2001/REC-xml-c14n-20010315″></CanonicalizationMethod><SignatureMethod Algorithm=”http://www.w3.org/2001/04/xmldsig-more#rsa-sha256″></SignatureMethod><Reference URI=”#CFe35170608723218000186599000120290000169126724″><Transforms><Transform Algorithm=”http://www.w3.org/2000/09/xmldsig#enveloped-signature”></Transform><Transform Algorithm=”http://www.w3.org/TR/2001/REC-xml-c14n-20010315″></Transform></Transforms><DigestMethod Algorithm=”http://www.w3.org/2001/04/xmlenc#sha256″></DigestMethod><DigestValue>iSR5ENKHZvjB3xALFAv1N+jvj9Nggaa3B4JSQEQpc2A=</DigestValue></Reference></SignedInfo><SignatureValue>hraxN9Qh2dXVcja70uGg6UvrMov36kn/dUEblUcZQDZkvJoZm1b02AdChYzUv+nQXNcf+6bzHYlr+tMrh2uq+KcrWIal0nlkpYgMy22zSJh3VlRhCR52zZuimnst0+LS9aO4L3YnDBxDquxGEajYZ1MpVnff5NKpjo26zghnmNf2IckjcOMiT6AbxWue346S5ldcHJTwDnOvU8lCS7BW5X6qOrtY9zrhnHFj47FcJHDEkRq1wzb3KVu24BCtWVKiskY2QAEqAzbtLrX+6aA1TUoku0q9yoQotAXC0WOwd02d9/16Q8ZXwL9+jXKnpEMhnGJiXJBgQF1wJfihLCSovw==</SignatureValue><KeyInfo><X509Data><X509Certificate>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</X509Certificate></X509Data></KeyInfo></Signature></CFe>

Este retorno está ocorrendo em todos os cancelamentos ou apenas neste cupom?
Por favor, você poeria me enviar o log deste SDK? Envie para o email suporte@tanca.com.br.

Grato

Desculpe a demora.

Por favor, você poderia verificar o seguinte:
Não sei se é porque eu recortei e colei do forum mas o que apareceu para mim é que ao invés de usar o caracter aspas duplas (“) – hexa: 22, está sendo usado este: (”) – que em hexa utf-8 seria E2 80 9D.

Se não for isto, por favor me envie os xmls por email.

Com relação a bug no SDK não acredito, pois nele roda exatamente o mesmo programa que o SAT de produção. O que muda são apenas os Web Services que o mesmo acessa.
Vou executar novos testes com o material que você me enviou e no período da tarde te retorno o resultado.

Abraço