Unable to edit the vApp and VM properties with Error " A specified parameter was not correct: val[0]"

Products

• VMware Cloud Director

Issue/Introduction

Any attempt to modify VM NICs or general VM/vApp settings fails with the following error:

“The operation could not be performed because the argument is invalid. A specified parameter was not correct: val[0]”

The /opt/vmware/vcloud-director/logs/vcloud-container-debug.log shows the following entries at the time of failure:

2025-10-20 08:55:07,138 | DEBUG | compute-fabric-activity-pool65 | GenericVirtualResourcePool | New capacity: Memory=[reservation: 0MB, limit: 4,392,673MB]

Caused by: (vim.fault.InsufficientMemoryResourcesFault) { faultCause = null, faultMessage = null, unreserved = 0, requested = 104857600 }

From the logs, it appears that during the vApp update/editing process,a specific memory value (104,857,600 bytes) is being requested.

Although the resource pool reflects a memory reservation of 0 MB, vCenter reports unreserved = 0, resulting in an InsufficientMemoryResourcesFault for the backing resource pool.

The failure originates from the vCenter side and is surfaced in vCD as the generic “val[0]” error.

Environment

VMware Cloud Director 10.x

Cause

This is due to stale memory reservation data residing in the resource_pool_inv table that does not reflect the actual state in vCenter. It appears the VCD database maintains "phantom" reservations, causing vCenter to reject reconfiguration tasks with an InsufficientMemoryResourcesFault (Error: val[0]).

Resolution

To resolve this issue ,  the stale memory reservation data from the resource_pool_inv table needs to be cleared

Before proceeding, please ensure the following precautions are taken:

• Take a full VMware Cloud Director Database Backup

• Take snapshots of all vCD cells to allow rollback in case of any unexpected impact.

Once these necessary safeguards have been completed, you will need to contact Broadcom Support, as the steps to clear the stale memory reservation data requires direct modification of the database.