EDI 270 eligibility request and EDI 271 response.

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EDI

I have generated the "EDI 270 version 5010" Claim eligibility request. My EDI 270 file looks like this:

ISA*00* 00 *ZZ*000345678*ZZ*ReceiverID*181123*1153*}*00401*000000001*1*P*:~ GS*HS*000345678*ReceiverID*20181123*115305*0001*X*005010X279A1~ ST*270*0001*005010X279A1~ BHT*0022*13*(it is empty)*20181123*1153~ HL*1**20*1~ NM1*PR*2******PI*CMS~ HL*2*1*21*1~ NM1*1P*2******XX*0123456789~ HL*3*2*22*0~ NM1*IL*1*JAIN*PRACHI****MI*123456789A~ DMG*D8*19810809*F~ SE*10*0001~ GE*1*0001~ IEA*1*000000001~

But when I am trying to get the response EDI 271 from an API it always returns the acknowledgement given below:

ISA|00| |00| |ZZ|MyAPIName |ZZ|17282 |181119|0134|U|00401|000000001|1|P|^~ TA1|000000000|181119|0134|R|023~ IEA|0|000000001~

I searched for the description of this acknowledgement and i found it indicates "improper(premature) end of file as given in this document:

"https://docs.microsoft.com/en-us/biztalk/core/x12-ta1-acknowledgment-error-codes"

I developed my EDI 270 file using this document as a referral: "https://www.cms.gov/Medicare/Coordination-of-Benefits-and-Recovery/Mandatory-Insurer-Reporting-For-Group-Health-Plans/Downloads/New-Downloads/MMSEA-111-270-271-Health-Care-Eligibility-Benefit-Inquiry.pdf"

According to this document my EDI 270 file is correct(I checked all the values from this document). But the API I am hitting to get 271 response always returns the acknowledgement i specified above.

Please help me to find the error/problem in my EDI file and its solution. If you have any solution for my problem please help me with the solution.

What I have tried:

I developed my EDI 270 file using this document as a referral: "https://www.cms.gov/Medicare/Coordination-of-Benefits-and-Recovery/Mandatory-Insurer-Reporting-For-Group-Health-Plans/Downloads/New-Downloads/MMSEA-111-270-271-Health-Care-Eligibility-Benefit-Inquiry.pdf"

According to this document my EDI 270 file is correct(I checked all the values from this document). But the API I am hitting to get 271 response always returns the acknowledgement i specified above.