I would suggest starting with a rebuild, In Desktop, back up the file then use the main menu File>Utilities>Rebuild and  run it as many times as necessary (but at least 3 times) until it completes, then run verify (if there are still errors run rebuild again), then close QB and […]

Resolution for 'completes issue: 'Pro16 vs Pro10. Any Inven Part Item entered in QB10 can Inv, any IPI entered after install Q16 can’t Inv. (doesn’t exist) How to enter IPI in Q16 & show on Inv?' available: Yes.

The completes issue or error code is a known issue in Quickbooks Online (QBO) and/or Quickbooks. Support for this issue is available either by self-service or paid support options. Experts are available to resolve your Quickbooks issue to ensure minimal downtime and continue running your business. First try to resolve the completes issue yourself by looking for a resolution described in the article. If it is a complex completes issue or you are unable to solve the issue, you may contact us by clicking here or by using other completes support options.

For more information about resolving issues related to completes in Quickbooks/QBO or to get support for the issue 'Pro16 vs Pro10. Any Inven Part Item entered in QB10 can Inv, any IPI entered after install Q16 can’t Inv. (doesn’t exist) How to enter IPI in Q16 & show on Inv?', click the link below: