Workspace combiantion, Error in <TBufferFile::CheckCount>: buffer offset too large (larger than 1073741822)

ROOT
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Dear ROOT experts,

I was doing one combination with 12 input workspaces and one buffer error will happen when writing the combined workspace into root file. I find if the file size is larger than 100MB but less than about 125MB, the buffer error happens but the workspaces could be fitted. If the file size is larger than 125MB, the combination program will break. I will appreciate it if you could give me some advice to fix it. Please let me know if you need other information from me. Thanks a lot.

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_ROOT Version:6.34/06

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Hello @zhiliangChen,

it looks to me like a limitation for how large a single object written to a file can be. @pcanal, could you have a look?

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Maybe related: [RF] Creating snapshots blows up the size of RooWorkspace to easily reach 1GB buffer limit · Issue #18032 · root-project/root · GitHub

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