Bicep error code - BCP401
This error occurs when you use expressions to define resource bodies as the Spread
operator gets converted to a function. It's a limitation in JSON.
Error description
The spread operator "..." is not permitted in this location.
Examples
The following example raises the error because the spread
operator is used to define the resource body:
param location string = resourceGroup().location
param addressPrefix string = '10.0.0.0/24'
resource vnet 'Microsoft.Network/virtualNetworks@2024-01-01' = {
name: 'vnetName'
location: location
...(addressPrefix != '' ? {
properties: {
addressSpace: {
addressPrefixes: [
addressPrefix
]
}
}
} : {})
}
You can fix the error by using the operator in the lower level:
param location string = resourceGroup().location
param addressPrefix string = '10.0.0.0/24'
resource vnet 'Microsoft.Network/virtualNetworks@2024-01-01' = {
name: 'vnetName'
location: location
properties: {
addressSpace: {
...(addressPrefix != '' ? {
addressPrefixes: [
addressPrefix
]
} : {})
}
}
}
Next steps
For more information about Bicep error and warning codes, see Bicep core diagnostics.