SnapCenter Plug-in for Windows is unable to resize disk with error "Invalid LUN size"

• SnapCenter Server [SC]
• SnapCenter Plug-in for Windows [SCW]
• Storage Virtual Machine [SVM]

• The size slider in the SnapCenter GUI decreases instead of increasing.
• Manually entering a larger size and submitting results in the error: “Invalid LUN size.”
•  Manual LUN expansion via ONTAP System Manager (OCSM) is successful, indicating no ONTAP-side or hardware limitation.
• The SnapManagerWeb.log show:

 2026-01-08T09:02:36.9860842-06:00 DEBUG SnapManagerWeb PID=[8776] TID=[47] Basic: HTTPS URL : https://<host_name>:8145/ProvisionHostService/SDProvisionGetResizeDiskLimit

2026-01-08T09:02:36.9862295-06:00 DEBUG SnapManagerWeb PID=[8776] TID=[47] Basic: Certificate Name: [CN=<host_name>], Issuer: [CN=<host_name>], Hash: [652EFA49D7325BFE7D3EC8DCE1E98B3D840611B5], Public friendly name: [], Public key size: [3072], Public key exchange algorithm: [RSA]

2026-01-08T09:03:10.1729398-06:00 DEBUG SnapManagerWeb PID=[8776] TID=[49] InvokeXML: Response Data: ****************************

<?xml version="1.0" encoding="utf-16"?><SDProvisionGetResizeDiskLimitResponse xmlns:xsi=http://www.w3.org/2001/XMLSchema-instance xmlns:xsd=http://www.w3.org/2001/XMLSchema><Job><Id>0</Id><StartTime xsi:nil="true" /><EndTime xsi:nil="true" /><IsCancellable>false</IsCancellable><IsRestartable>false</IsRestartable><IsCompleted>false</IsCompleted><IsVisible>true</IsVisible><IsScheduled>false</IsScheduled><PercentageCompleted>0</PercentageCompleted><Status>Running</Status><Priority>None</Priority><Tasks /><ParentJobID>0</ParentJobID><EventId>0</EventId><JobTypeId xsi:nil="true" /><ObjectId>0</ObjectId><PluginCode>NONE</PluginCode><HostId>0</HostId><RoleId xsi:nil="true" /><JobIds /><MaxJobsInQueue>0</MaxJobsInQueue><Tags /><QueueTimeoutMins>0</QueueTimeoutMins><IsBulkJobUpdate>false</IsBulkJobUpdate></Job><Message><LogLevelSpecified>false</LogLevelSpecified><IDSpecified>false</IDSpecified><SDError>102</SDError><Message>Failed to determine storage layout for filesystem</Message></Message><MinSize>0</MinSize><MaxSize>0</MaxSize></SDProvisionGetResizeDiskLimitResponse>

2026-01-08T09:03:10.1729519-06:00 DEBUG SnapManagerWeb PID=[8776] TID=[49] Invoking Service successfully : https://<host_name>:8145/ProvisionHostService/SDProvisionGetResizeDiskLimit

2026-01-08T09:03:10.1732758-06:00 DEBUG SnapManagerWeb PID=[8776] TID=[49] ProvisionDiskController: Successfully retrieved response for SDProvisionGetResizeDiskLimit: MaxSize = 0  MinSize = 0

• SCW logs show: 

2026-01-29T11:08:31.1585646-06:00 DEBUG SCW_28917 PID=[5076] TID=[130] Invoking Connect-NcController ...2026-01-29T11:08:35.1996224-06:00 DEBUG SCW_28917 PID=[5076] TID=[130] ex.Message : The running command stopped because the preference variable "ErrorActionPreference" or common parameter is set to Stop: API invoke failed:No connection could be made because the target machine actively refused it. [::ffff:<SVM_IP>]:443 (<SVM_IP>:443)

.

.

2026-01-29T11:08:35.1999616-06:00 ERROR SCW_28917 PID=[5076] TID=[130] Message    : Failed to connect to the storage system <SVM_Name>Please check the storage system name, IP address, or the specified credentials and the network connectivity.