Hi @Dharshankumaar Mahendran 

We are using IFS10. I can’t reach the WorkTaskServices handling. 

Maybe WorkTaskHandling can help you. 

If you provide the JSON content inside the URL which is below. I can check your handling.

https://url:port/int/ifsapplications/projection/v1/WorkTaskServices.svc/$openapi?V3

@Dharshankumaar Mahendran 

Some points you can check.

• Can you post your header information?
• Did you correctly use the If-Match header to indicate which id you wanted to update
  • generally you HAVE to do a GET first, copy the If-Match and use it to PATCH the record
  • Make sure its correctly encoded
• Sometimes you have to add two extra header lines so it can convert everything correctly 
• If you have issues @dsj has written a nice tool how you can add debug messages to your request. (by adding the ?odata-debug-json query parameter) 
  • See https://github.com/damithsj/IFSCloud-Postman-Trace-Visualizer

Example request with header (This is a PATCH example)

You will notice a couple of things:

• Correctly use the If-Match (Make sure its correctly encoded!!! (eg. no \ signs)
• add the extra headers
  • Accept: application/json;odata.metadata=full;IEEE754Compatible=true
    Content-Type: application/json;IEEE754Compatible=true
• Add the query parameter to debug the request - ?odata-debug-json

PATCH /main/ifsapplications/projection/v1/ScheduleOfWorkProductionRecordHandling.svc/ScheduleOfWorkSet(ProjectId='1051',SchOfWorkType='FOR',SchOfWorkNo=1,VersionId='1')/SchOfWorkItemArray(ProjectId='1051',SchOfWorkType='FOR',SchOfWorkNo=1,VersionId='1',ItemNo=1)?odata-debug=json HTTP/1.1
Host:-cfg.ifs.cloud
If-Match: W/"Vy8iQUFBWFpnQUJlQUFEbW9FQUFMOjIwMjMwOTI5MTcyNDU3Ig=="
Accept: application/json;odata.metadata=full;IEEE754Compatible=true
Content-Type: application/json;IEEE754Compatible=true
Content-Length: 196

{
    "WorkRecordSelection": "CumulativeQuantity",
    "CurrentQuantity": "-0.3",
    "RecordDate": "2023-09-29",
    "RecordPerson": "test",
    "CompleteRecording": false,
    "Note": "test"
}