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I am trying to do runtime upgrade of substrate blockchain which is running on 0.9.36 version to substrate version v1.0.0 . While doing runtime upgrade chain stops working and getting this error in logs.

ERROR {" Error at calling runtime api: Execution failed: Execution aborted due to trap: wasm trap: wasm unreachable instruction executed"}

Can anyone please tell how to avoid this error without affecting blockchain.

I have done this till now. I have upgraded versions from 0.9.36 ->0.9.37 ->...-> 0.9.43. everything is going fine there,But when i tried to runtime upgrade from 0.9.43 -> 1.0.0 the blockchain stopped working and i have started receiving errors(same as above) in logs. can you please tell me what is going wrong from 0.9.43 to 1.0.0 and provide me with some solution .

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    What runtime is it? The migrations need to be applied one by one and cannot be skipped.
    – Oliver Tale-Yazdi
    Aug 21 at 12:00
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    As Oliver stated, recommended path is 0.9.36 -> 0.9.37 -> ... 1.0.0 making sure that for each upgrade the migrations are run. You can use try-runtime to ensure the migrations run smoothly before applying them in production.
    – Bruno ♦
    Aug 21 at 22:08
  • @Bruno i am facing this issue only in contracts pallet .I am able to do runtime upgrade to v1.0.0 while commenting contracts pallet in runtime in 1.0.0 version .
    – Karanvir Singh
    Aug 22 at 6:44
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    I would do contracts pallet one polkadot version at a time. There are several migrations and there was also a multi-block migration that I believe changed the pre-existing migrations but I'd imagine it did not interfere with the actual migrations. If you do not want to do the contracts migration one release at a time then you have to see all the migrations that need to be applied from .36 to 1.0.0 and make sure they are being applied.
    – Bruno ♦
    Aug 22 at 18:19
  • @Bruno i have upgraded versions from 0.9.36 ->0.9.37 ->...-> 0.9.43. everything is going fine there,But when i tried to runtime upgrade from 0.9.43 -> 1.0.0 the blockchain stopped working and i have started receiving errors in logs.
    – Karanvir Singh
    Aug 29 at 13:11

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