How To Fix /IWBEP/CM_MGW_RT155 - Characters 'SPACE' and '/.,()'"=_%*-+_¯' are not allowed

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWBEP/CM_MGW_RT -

• Message number: 155

• Message text: Characters 'SPACE' and '/.,()'"=_%*-+_¯' are not allowed

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message /IWBEP/CM_MGW_RT155 - Characters 'SPACE' and '/.,()'"=_%*-+_¯' are not allowed ?

  The SAP error message /IWBEP/CM_MGW_RT155 indicates that certain characters are not allowed in the context where you are trying to use them. This error typically occurs in the context of OData services or when working with the SAP Gateway framework, particularly when dealing with query parameters or entity keys.
  Cause:
  The error is triggered when you attempt to use characters that are not permitted in the context of the operation you are performing. The specific characters mentioned in the error message (SPACE, /.,()'"=_%*-+_¯) are restricted in certain fields or parameters, such as:
  
  Query parameters in OData requests
  Entity keys
  Filter expressions
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check Input Values: Review the input values you are sending in your OData request. Ensure that none of the restricted characters are included in the parameters, entity keys, or filter expressions.
  
  
  Encode Special Characters: If you need to include special characters in your request, consider URL encoding them. For example, spaces can be encoded as %20, and other special characters have their own encoding.
  
  
  Modify the Request: If the request is being generated programmatically, ensure that the code generating the request does not include any of the restricted characters.
  
  
  Review Documentation: Check the SAP documentation for the specific OData service you are using to understand the allowed characters and formats for the parameters.
  
  
  Testing: After making the necessary changes, test the request again to see if the error persists.
  
  
  Related Information:
  
  SAP Gateway: The SAP Gateway is a technology that allows you to connect devices, environments, and applications to SAP systems. Understanding how it handles OData services can help in troubleshooting issues like this.
  OData Protocol: Familiarize yourself with the OData protocol, which defines how to create and consume RESTful APIs. This includes understanding how to format requests and what characters are allowed in different contexts.
  SAP Notes: Check for any relevant SAP Notes or Knowledge Base Articles that might address this specific error or provide additional context.
  
  If the issue persists after following these steps, consider reaching out to your SAP support team or consulting the SAP Community for further assistance.