Compilation Failed in DspBlock, 2.5_exercise

[YeyeQian]

When compiling the DspBlock in 2.5_exercise, I run into some problem.
"
cmd2.sc:12: reference to Data is ambiguous;
it is imported twice in the same scope by
import root.chisel3.{Reg, Bool, withClockAndReset, assert, fromStringToLiteral, ExplicitCompileOptions, util, chiselTypeOf, Hexadecimal, Character, shim, IgnoreSeqInBundle, SyncReadMem, UnsupportedOperationException, stop, AutoClonetypeException, MixedDirectionAggregateException, SpecifiedDirection, NotLiteralException, ModuleAspect, fromIntToWidth, fromDoubleToLiteral, fromIntToLiteral, Output, Mux, withReset, Wire, ClockResolutionException, HasChiselExecutionOptions, PrintableHelper, getModulePorts, Record, FullName, fromLongToLiteral, Mem, Clock, UIntFactory, BoolFactory, withClock, Input, UnpokeableException, WhenContext, FirrtlFormat, Data, ChiselExecutionSuccess, printf, testers, fromIntToBinaryPoint, Printables, internal, ExpectedHardwareException, BindingException, Binary, Element, WireDefault, core, aop, RebindingException, VecFactory, BackendCompilationUtilities, Flipped, Module, fromBigIntToLiteral, Num, ChiselExecutionResult, ResetType, Percent, iotesters, Printable, tester, AliasedAggregateFieldException, RegNext, string2Printable, MonoConnectException, ActualDirection, RawModule, InstanceId, getDataElements, Bits, Name, Vec, stage, LiteralTypeException, Bundle, UInt, VecInit, PString, SIntFactory, ChiselException, dontTouch, ChiselExecutionOptions, SInt, ExpectedChiselTypeException, Reset, Decimal, SourceInfoDoc, Aggregate, fromBooleanToLiteral, CompileOptions, WireInit, BuildInfo, DontCare, AsyncReset, when, BiConnectException, VecLike, WireFactory, ChiselExecutionFailure, BlackBox, MultiIOModule, RegInit, MemBase}
and import root.almond.display.{Data, Display, FileLink, Html, IFrame, Image, Javascript, Json, Latex, Markdown, Math, PrettyPrint, ProgressBar, Svg, Text, TextDisplay, UpdatableDisplay}
abstract class FIRBlock[D, U, EO, EI, B <: Data](val nFilters: Int, val nTaps: Int)(implicit p: Parameters)
^cmd2.sc:44: not found: type MyManyDynamicElementVecFir
val fir = Module(new MyManyDynamicElementVecFir(nTaps))
^Compilation Failed
"
I wonder how to deal with it.

[edwardcwang]

Hello, and thanks for your interest in Chisel! Did you make sure to run the entire notebook? MyManyDynamicElementVecFir is defined in a cell above.

[BeenLi]

I have ran the entire notebook, but I got a similar error. Can you help me? @edwardcwang

[edwardcwang]

Hello, I just tried running the entire 2.5 notebook again and it seems to work. Did you already try restarting the notebook? If it still does not work, which cell is it crashing on? Thank you for your co-operation!