Why do I receive MathWorks Licensing Error 87?
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Why do I receive the following error:
MathWorks Licensing Error 87
Maximum number of <PRODUCTNAME> license keys have been checked out for you or your group.
Try again later or contact your system administrator to review the MAX value in the options file.
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MathWorks Support Team
2025-12-9
编辑：MathWorks Support Team
2025-12-9
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This error indicates that the maximum number of keys, defined by a MAX statement in an options file, are currently checked out. The MAX statement can be defined in an options file on the license server to limit the number of product keys for a user or group. In order to resolve this error, a user defined in the MAX statment must exit MATLAB in order for the key(s) to be returned to the license pool on the license server.
If you have any questions regarding the MAX statement, please contact your License Administrator. The MAX statement is manually created by the administrator of the license.
If you receive this error when attempting to open a second Simulink model under an older release, see the Related Solution linked below.
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在 帮助中心 和 File Exchange 中查找有关 Manage Products 的更多信息
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2009-6-27
2025-12-9
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