Getting "Missing Parameter" Response even though WSDL describes it as optional field

Question

Hi.&nbsp; I'm a newbie trying to send a REST POST request and I'm getting an error saying "Missing parameter: companyName".&nbsp; However, in looking at the WSDL definition for the request, it says the "companyName" field is optional.&nbsp; If this is the case, why is it throwing this error saying that it is a Missing Parameter? The request works when I fill it in but there are a lot of cases where I do not want this parameter filled out.&nbsp;&nbsp;Is it because I am using a REST POST request instead of a SOAP request and REST requests require all parameters somehow be populated in the request?&nbsp; Is there a way I can make the parameter blank? Check screenshots for further information.&nbsp; Thanks.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

fredsvar · Answer

WSDLs are for SOAP and they (REST and SOAP) differ quite a lot when it comes down to passing parameters so I think it is because you are not using a SOAP request.

mix0mat0sis · Answer

Thank you for response! I believe I finally got past it by finding this forum post:

https://community.smartbear.com/t5/SoapUI-Open-Source/REST-request-does-not-contain-parameter-if-value-is-an-empty/td-p/9146

I had to make the parameter required even though it's value is blank.

Now the next issue I am running into is that one of my parameters is a Base64Binary type and keeping that value as blank triggers an error saying: "Cannot convert to System.Byte. Input string was not in a correct format" error.

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Getting "Missing Parameter" Response even though WSDL describes it as optional field

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