Can't access file

[calz1]

I noticed in the Windows setup you have to put /c but just --yes for Linux. Is there no need to tell it which filesystem to use in Linux? I get this error when trying to access a file on Linux Mint.

 Error occurred in handler for 'mcp-call-tool': Error: MCP error -32602: MCP error -32602: File [/home/cal/Documents/controls.xlsx] not found

I can see the file:

cal@x:~/Documents$ pwd
/home/cal/Documents
cal@x:~/Documents$ ls -l *.xlsx
-rw-rw-r-- 1 cal cal 5575 Mar 17 12:21 controls.xlsx

[negokaz]

@calz1
This MCP server tries to access local filesystem.
Is the MPC server running on the computer where the xlsx file exists?

[calz1]

Yes, it is running locally. Another MCP server (filesystem) running on the same laptop can access the file.

[negokaz]

@calz1
I tried to reproduce the issue in a Docker container (ubuntu), but it didn’t happen.
Could you tell me the name of the tool that failed?
This MCP server has following tools:

• read_sheet_names
• read_sheet_data
• write_sheet_data

Also, could you share logs or screenshots that show how the MCP Server called?

[calz1]

Here I have only your MCP and the filesystem one activated:

Here are more logs:

20:32:20.821 › [openai] tool call read_sheet_names___excel-mcp-server with {"fileAbsolutePath": "/home/cal/Documents/si.xlsx"} file:///usr/lib/witsy/resources/app.asar/.vite/renderer/main_window/assets/index-WLPvfL9b.js:301
20:32:20.821 › Calling MCP tool read_sheet_names { fileAbsolutePath: '/home/cal/Documents/si.xlsx' }
20:32:20.867 › Error occurred in handler for 'mcp-call-tool': Error: MCP error -32602: MCP error -32602: File [/home/cal/Documents/si.xlsx] not found
    at Ou._onresponse (/usr/lib/witsy/resources/app.asar/.vite/build/main.js:2102:72210)
    at _transport.onmessage (/usr/lib/witsy/resources/app.asar/.vite/build/main.js:2102:70055)
    at y7.processReadBuffer (/usr/lib/witsy/resources/app.asar/.vite/build/main.js:2104:1937)
    at Socket.<anonymous> (/usr/lib/witsy/resources/app.asar/.vite/build/main.js:2104:1545)
    at Socket.emit (node:events:519:28)
    at addChunk (node:internal/streams/readable:559:12)
    at readableAddChunkPushByteMode (node:internal/streams/readable:510:3)
    at Readable.push (node:internal/streams/readable:390:5)
    at Pipe.onStreamRead (node:internal/stream_base_commons:191:23)

Here is the other MCP looking at the same path:

20:35:23.132 › Calling MCP tool list_directory { path: '/home/cal/Documents' }
20:35:23.138 › [openai] tool call list_directory___smithery-ai-filesystem => {"result":"[DIR] Cline\n[DIR] archive\n[FILE] email.md\n[DIR] output\n[FILE] si.xlsx\n[FILE] sys_docs.txt"} file:///usr/lib/witsy/resources/app.asar/.vite/renderer/main_window/assets/index-WLPvfL9b.js:301

It appears to see the file fine here [FILE] si.xlsx\n

[negokaz]

@calz1

Thank you for the detailed information.
Could you let me know how you’ve set up the MCP Server to your witsy?

The MCP Server version might be outdated.
The latest version, if a file is not found, shows an error message like the following:

[calz1]

I updated to the latest version on Smithery but something seems wrong in the newest version. I am testing with Witsy. When I have this MCP enabled, I get:

16:23:08.787 › Error while generating text: undefined {"error":{"type":"EventStreamError","code":"_stream_conversation_error","message":"An error occurred (validationException) when calling the ConverseStream operation: The model returned the following errors: tools.12.custom.input_schema: JSON schema is invalid. It must match JSON Schema draft 2020-12 (https://json-schema.org/draft/2020-12)

Prompt was:

{
  "model": "XXX",
  "messages": [
    {
      "role": "system",
      "content": "You are an AI assistant designed to assist users by providing accurate information, answering questions, and offering helpful suggestions. Your main objectives are to understand the user's needs, communicate clearly, and provide responses that are informative, concise, and relevant. Current date and time is 3/25/2025, 4:24:52 PM"
    },
    {
      "role": "user",
      "content": "hi"
    }
  ],
  "tools": [
    {
      "type": "function",
      "function": {
        "name": "read_sheet_names___negokaz-excel-mcp-server",
        "description": "List all sheet names in an Excel file",
        "parameters": {
          "type": "object",
          "properties": {
            "fileAbsolutePath": {
              "type": "string",
              "description": "Absolute path to the Excel file"
            }
          },
          "required": [
            "fileAbsolutePath"
          ]
        }
      }
    },
    {
      "type": "function",
      "function": {
        "name": "read_sheet_data___negokaz-excel-mcp-server",
        "description": "Read data from Excel sheet with pagination.",
        "parameters": {
          "type": "object",
          "properties": {
            "fileAbsolutePath": {
              "type": "string",
              "description": "Absolute path to the Excel file"
            },
            "knownPagingRanges": {
              "type": "array",
              "description": "List of already read paging ranges",
              "items": "string"
            },
            "range": {
              "type": "string",
              "description": "Range of cells to read in the Excel sheet (e.g., \"A1:C10\"). [default: first paging range]"
            },
            "sheetName": {
              "type": "string",
              "description": "Sheet name in the Excel file"
            }
          },
          "required": [
            "fileAbsolutePath",
            "sheetName"
          ]
        }
      }
    },
    {
      "type": "function",
      "function": {
        "name": "read_sheet_formula___negokaz-excel-mcp-server",
        "description": "Read formulas from Excel sheet with pagination.",
        "parameters": {
          "type": "object",
          "properties": {
            "fileAbsolutePath": {
              "type": "string",
              "description": "Absolute path to the Excel file"
            },
            "knownPagingRanges": {
              "type": "array",
              "description": "List of already read paging ranges",
              "items": "string"
            },
            "range": {
              "type": "string",
              "description": "Range of cells to read in the Excel sheet (e.g., \"A1:C10\"). [default: first paging range]"
            },
            "sheetName": {
              "type": "string",
              "description": "Sheet name in the Excel file"
            }
          },
          "required": [
            "fileAbsolutePath",
            "sheetName"
          ]
        }
      }
    },
    {
      "type": "function",
      "function": {
        "name": "write_sheet_data___negokaz-excel-mcp-server",
        "description": "Write data to the Excel sheet",
        "parameters": {
          "type": "object",
          "properties": {
            "data": {
              "type": "array",
              "description": "Data to write to the Excel sheet",
              "items": "string"
            },
            "fileAbsolutePath": {
              "type": "string",
              "description": "Absolute path to the Excel file"
            },
            "range": {
              "type": "string",
              "description": "Range of cells in the Excel sheet (e.g., \"A1:C10\")"
            },
            "sheetName": {
              "type": "string",
              "description": "Sheet name in the Excel file"
            }
          },
          "required": [
            "fileAbsolutePath",
            "sheetName",
            "range",
            "data"
          ]
        }
      }
    },
    {
      "type": "function",
      "function": {
        "name": "write_sheet_formula___negokaz-excel-mcp-server",
        "description": "Write formulas to the Excel sheet",
        "parameters": {
          "type": "object",
          "properties": {
            "fileAbsolutePath": {
              "type": "string",
              "description": "Absolute path to the Excel file"
            },
            "formulas": {
              "type": "array",
              "description": "Formulas to write to the Excel sheet (e.g., \"=A1+B1\")",
              "items": "string"
            },
            "range": {
              "type": "string",
              "description": "Range of cells in the Excel sheet (e.g., \"A1:C10\")"
            },
            "sheetName": {
              "type": "string",
              "description": "Sheet name in the Excel file"
            }
          },
          "required": [
            "fileAbsolutePath",
            "sheetName",
            "range",
            "formulas"
          ]
        }
      }
    }
  ],
  "tool_choice": "auto",
  "stream_options": {
    "include_usage": true
  },
  "stream": true
}