deepseek-ai/deepseek-harness · error · Error

cannot read "${target.displayPath}": the ${extension} extens

Error message

cannot read "${target.displayPath}": the ${extension} extension declares ${mediaType}, but the bytes use a different image format; rename the file to match its actual format if it is PNG/JPEG/WebP/GIF, or convert it to one of those formats

What it means

Error "cannot read "${target.displayPath}": the ${extension} extension declares ${mediaType}, but the bytes use a different image format; rename the file to match its actual format if it is PNG/JPEG/WebP/GIF, or convert it to one of those formats" thrown in deepseek-ai/deepseek-harness.

Source

Thrown at packages/fs/tool-fs/src/read-image.ts:252

            `cannot read "${target.displayPath}": the image exceeds the ${attachments.imageLimits.maxImagePixels}-pixel decoded-size limit; downscale the image and read the smaller copy`,
            { cause: error },
          )
        }
        if (error.code === 'IMAGE_TOO_LARGE') {
          throw new Error(
            `cannot read "${target.displayPath}": the image cannot be stored within the deployment's byte limits; downscale the image and read the smaller copy`,
            { cause: error },
          )
        }
        if (error.code === 'ATTACHMENT_WRITE_FAILED' && /16-bit PNG/iu.test(error.message)) {
          throw new Error(
            `cannot read "${target.displayPath}": the 16-bit PNG could not be converted to the normalized 8-bit sRGB form; convert it to an 8-bit PNG/JPEG/WebP and retry`,
            { cause: error },
          )
        }
        if (error.code !== 'IMAGE_TYPE_MISMATCH') throw error
        const extension = extname(target.displayPath).toLowerCase()
        throw new Error(
          `cannot read "${target.displayPath}": the ${extension} extension declares ${mediaType}, but the bytes use a different image format; rename the file to match its actual format if it is PNG/JPEG/WebP/GIF, or convert it to one of those formats`,
          { cause: error },
        )
      }
      ctx.emit('fs/observed', target, { kind: 'present', version: info.version }, exec)
      const value: ImageReadValue = {
        path: target.displayPath,
        image: {
          attachmentId: ref.attachmentId,
          mediaType: ref.mediaType,
          bytes: ref.bytes,
          width: ref.width,
          height: ref.height,
          ...ref.name === undefined ? {} : { name: ref.name },
          ...ref.originalDimensions === undefined ? {} : {
            originalDimensions: { ...ref.originalDimensions },
          },
        },

View on GitHub (pinned to b150a551b8)

When it happens

Trigger: Thrown at packages/fs/tool-fs/src/read-image.ts:252 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of deepseek-ai/deepseek-harness@b150a551b8 (2026-08-24). Data as JSON: /api/errors/027f9456f5d0bb8b. Report an issue: GitHub.