IMA SDK giving 400 response while requesting ads

[Sunil Kumar]

Hi Support Team, 

I am getting 400 responses while requesting ads in IMA SDK and not able to find why this is showing this 400 response. 

Can you please review the screenshot and URL and advise the issue? 

https://pubads.g.doubleclick.net/gampad/ads?iu=%2F1007232%2FIT_embed_internal_web_VOD&description_url=https%3A%2F%2Fwww.indiatoday.in%2Findia%2Ftelangana%2Fvideo%2Fmarwari-go-back-protest-in-telangana-after-parking-clash-bjp-defends-community-2773393-2025-08-19&tfcd=0&npa=0&sz=400x300%257C640x480&gdfp_req=1&output=xml_vast4&unviewed_position_start=1&env=vp&correlator=107083879818910&vad_type=linear%20&cust_params=category%253DIndia%252C2773393%2526keywords%253Dindia%20today%2C%20marwadi%2C%20telangana%2C%20go%20back%20campaign%2C%20caste%20slurs%2C%20parking%20issue%2C%20secunderabad%2C%20gujarat%2C%20rajasthan%2C%20bandi%20sanjay%2C%20raja%20singh%2C%20hindu%20dharma%2C%20sanatan%20dharma%2C%20bjp%2C%20congress%2C%20aimim%2C%20sc%2C%20st%2C%20dalit%2C%20activists%2C%20hyderabad%2C%20protest%2C%20local%20businesses%2C%20employment%20opportunities%2C%20community%20tension&plcmt=1&vpmute=0&vid_t=%27Marwari%20go%20back%27%20protest%20in%20Telangana%20after%20parking%20clash%2C%20BJP%20defends%20community&vpa=click&sdkv=h.3.714.1&osd=2&frm=0&vis=1&sdr=1&hl=en&afvsz=200x200%2C250x250%2C300x250%2C336x280%2C450x50%2C468x60%2C480x70%2C728x90&is_amp=0&uach=WyJXaW5kb3dzIiwiMTkuMC4wIiwieDg2IiwiIiwiMTM3LjAuNzE1MS41NSIsbnVsbCwwLG51bGwsIjY0IixbWyJHb29nbGUgQ2hyb21lIiwiMTM3LjAuNzE1MS41NSJdLFsiQ2hyb21pdW0iLCIxMzcuMC43MTUxLjU1Il0sWyJOb3QvQSlCcmFuZCIsIjI0LjAuMC4wIl1dLDBd&u_so=l&ctv=0&mpt=jwplayer&mpv=8.38.2&sdki=100000445&ptt=20&vo=0&adk=1004259536&sdk_apis=2%2C7%2C8&omid_p=Google1%2Fh.3.714.1&sid=AE61B042-B2A0-43F8-A6D2-314CA07B5E29&htps=10&nel=1&td=1&eid=95322027%2C95331589%2C95332046&url=https%3A%2F%2Fembed.indiatoday.in%2Fshare%2Fvideo%2Findia%2Ftelangana%2FMjc3MzM5Mw%3D%3D%3Fdebug%3D1&dlt=1755589723629&idt=3317&dt=1755589761157&cookie=ID%3D8a98194376c0dcf1%3AT%3D1755589520%3ART%3D1755589520%3AS%3DALNI_Mb-WcA6gr7pld7I-Z1AtkvCvUVRVQ&cookie_enabled=1&eo_id_str=ID%3D6923b6393620d046%3AT%3D1755589520%3ART%3D1755589520%3AS%3DAA-AfjZKM13OWWQO5GgcUspWJgRW&pvsid=5475091828951138&scor=1084336965100301&ged=ve4_td37_tt34_pd37_la9000_er0.0.569.1011_vi0.0.911.1011_vp100_eb24171

 https://embed.indiatoday.in/share/video/india/telangana/Mjc3MzM5Mw==

Best regards,

Sunil Kumar

[IMA SDK]

Hi,

Thank you for contacting the IMA SDK Support team.

We are checking your issue and will get back to you shortly. Meanwhile, your patience is important.

Thanks,
 

IMA SDK Team

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[2025-08-19 18:07:03Z GMT] This message is in relation to case "ref:!00D1U01174p.!500Ht01u4cGN:ref" (ADR-00330377)

[Sunil Kumar]

Hi Support Team, 

Any update on this? 

Best regards,

Sunil Kumar

[IMA SDK]

Hi,

Thanks to getting back us

Based on the VAST tag you shared, the issue was with the sz (size) parameter format. You had used sz=400x300%257C640x480, which is incorrect due to the encoded pipe character. When passing multiple ad sizes, the correct format is sz=400x300|640x480 using a plain pipe (|) character. After making this change, the request works as expected. You can refer to the official documentation for more details on how to correctly pass multiple ad sizes.

Thanks,
 

IMA SDK Team

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[2025-08-25 12:36:41Z GMT] This message is in relation to case "ref:!00D1U01174p.!500Ht01u4cGN:ref" (ADR-00330377)